"here goes nothing" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "interjection",
        "head": "here goes nothing"
      },
      "expansion": "here goes nothing",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Well, I checked everything and I think it's wired up correctly, so I guess all that's left is to turn it on. Here goes nothing!",
          "type": "example"
        }
      ],
      "glosses": [
        "Indicates a lack of confidence or certainty about the activity about to be tried."
      ],
      "id": "en-here_goes_nothing-en-intj-34dnXDRy",
      "links": [
        [
          "lack",
          "lack#English"
        ],
        [
          "confidence",
          "confidence#English"
        ],
        [
          "certainty",
          "certainty#English"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) Indicates a lack of confidence or certainty about the activity about to be tried."
      ],
      "synonyms": [
        {
          "sense": "indicates a lack of confidence or certainty",
          "word": "here goes"
        }
      ],
      "tags": [
        "idiomatic"
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "sense": "indicates a lack of confidence or certainty",
          "word": "管不了那麽多了"
        },
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "guǎn bùliǎo nàme duō le",
          "sense": "indicates a lack of confidence or certainty",
          "word": "管不了那么多了"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "indicates a lack of confidence or certainty",
          "word": "katsotaan miten käy"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "indicates a lack of confidence or certainty",
          "word": "was soll schon schiefgehen"
        },
        {
          "code": "it",
          "lang": "Italian",
          "sense": "indicates a lack of confidence or certainty",
          "word": "o la va o la spacca"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "indicates a lack of confidence or certainty",
          "word": "raz kozie śmierć"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "bylá ne bylá",
          "sense": "indicates a lack of confidence or certainty",
          "word": "была́ не была́"
        }
      ]
    }
  ],
  "sounds": [
    {
      "audio": "en-au-here goes nothing.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/9a/En-au-here_goes_nothing.ogg/En-au-here_goes_nothing.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/9/9a/En-au-here_goes_nothing.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "here goes nothing"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "interjection",
        "head": "here goes nothing"
      },
      "expansion": "here goes nothing",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English idioms",
        "English interjections",
        "English lemmas",
        "English multiword terms",
        "English terms with audio links",
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "Well, I checked everything and I think it's wired up correctly, so I guess all that's left is to turn it on. Here goes nothing!",
          "type": "example"
        }
      ],
      "glosses": [
        "Indicates a lack of confidence or certainty about the activity about to be tried."
      ],
      "links": [
        [
          "lack",
          "lack#English"
        ],
        [
          "confidence",
          "confidence#English"
        ],
        [
          "certainty",
          "certainty#English"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) Indicates a lack of confidence or certainty about the activity about to be tried."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "en-au-here goes nothing.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/9a/En-au-here_goes_nothing.ogg/En-au-here_goes_nothing.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/9/9a/En-au-here_goes_nothing.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "synonyms": [
    {
      "sense": "indicates a lack of confidence or certainty",
      "word": "here goes"
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "sense": "indicates a lack of confidence or certainty",
      "word": "管不了那麽多了"
    },
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "guǎn bùliǎo nàme duō le",
      "sense": "indicates a lack of confidence or certainty",
      "word": "管不了那么多了"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "indicates a lack of confidence or certainty",
      "word": "katsotaan miten käy"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "indicates a lack of confidence or certainty",
      "word": "was soll schon schiefgehen"
    },
    {
      "code": "it",
      "lang": "Italian",
      "sense": "indicates a lack of confidence or certainty",
      "word": "o la va o la spacca"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "indicates a lack of confidence or certainty",
      "word": "raz kozie śmierć"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "bylá ne bylá",
      "sense": "indicates a lack of confidence or certainty",
      "word": "была́ не была́"
    }
  ],
  "word": "here goes nothing"
}