Oh wow! Your voice is amazing for fourteen! I'm not a song or vocal critic, but I can tell that your voice range is in the deeper octaves. You got all the notes right (which is ridiculously difficult, I know), but your voice is very breathy, and if you're going to do a cover of the song again, it might be unstable due to Mafumafu's insane range and pitch. You would be really good doing covers for utaites with deeper voices, for example 96Neko or Soraru. Another thing is the recording equipment. No sugarcoating here, your earbuds or phone did not do a good job doing your amazing voice properly. You're only fourteen, so I don't think you can buy equipment for now. Instead of making a YouTube channel with the things you have right now, I think it's best to practice, practice and practice to make sure your voice is as good as your vocal chords can allow you! Quick question, are you Japanese? I'm curious, because usually there isn't a Japanese person surfing through Utaite Wikia.