Yo! You can request for deletion on some interfaces, which would hide duplicate messages, but in general once you post it there's no take-backsies. Don't worry about it though, we all make mistakes it's just that on a protocol like this one we can't hide them, lol. Anyways, I make some music, haven't been super active lately but did take part in #nostrcypher number 5. You can find my stuff:
https://soundcloud.com/mckontext
https://www.youtube.com/@mckontext
And a whole bunch of downloads (all my original tracks are CC-BY 3.0 licensed): https://mega.nz/folder/Yws1CSZa#IL_QgwfYSFSmX1B68a3CMA