I got an 2d open-world adventure/rpg project, close to a graphical mud, with no codin experience, but willin to learn.
As it seems that Byond would help me, i'm wonderin about the fact that it has its own formats for resources, which sounds like a bad thing for me, if i canot use my own musics and drawins. Is it really so, or am i mistaken?

Thxs! :)
You should be able to import your artwork without any trouble, and the music formats supported are actually fairly well known. Shouldn't be any issues.