@Otakusempai105 wow obsess? now i get it. um i personally don't really like music related fic bcs what i really want is the story, not the lyric of a song (i skipped the lyric tho' tbh) but hey people are different. haha well i guess i can suggest you to: imagine first. i always imagine myself as the reader before making a story, how i wanna be treated with the anime character, how i should behave in the story, etc etc. imagination rainbows! while imagining all the scenes, the words will flow easily (it works for me). oh and don't forgrt to read fics as much as you can! sometimes to write what's in your head is not that easy, but with reading fics you can learn more abt how to use the words right in place. i somehow found myself writing a story while reading fics so i can imagine what words to put for the scene, etc (sorry if my fics contain words you've often found in any fics. but it helps!) different author will have different style of writing and you can learn much from them. especially, read fics with your fav genre and anime character. and also you can learn the character from watching the anime over and over again, so you can make a story with exact character from anime/manga.
wow i wrote so much lol. i hope it help youu! good luck on writing! you know what, you're better bcs you tried to write even sometimes it sucks, it's okay! well, at least you tried :) hehe