I maybe can help you some. Pixel arts, coding (mainly java), making sound effect, making music(my music was bad :( )
i think i'll take work for free maybe. im sorry if that sounds bad
For sound effect i really can do anything else may be i recommend you this piece of software
bfxr.net << have you ever heard of this?
for more better sound you might want to use Digital Audio Workstation (DAW) << this software range from free to paid (many all of them were paid but still there's some software are free)