Welcome to Itch!
Be sure to search Jams then Upcoming then "sounds" "audio" "OST" "soundtrack" and such.
The Jam competitions on Itch are for the most part very loose and friendly in criterion and their themes are often optional so that you can be in them, just to keep your creative momentum without necessarily rigidly adhering. (Often, not always)
I'm a composer who's secondarily as of not that long ago, also making games.
Gave you an itch follow, if you like the thing(s) on my page(s), consider doing the same.
Cheers!
--D
main website: