hello! Welcome to deviant art! Yay ! A fellow Steven Universe fan! I see you figured out how to submit deviations! Next thing I would sugeest is making some friends and getting your art out there ! There are lots of ways to do that on deviant art but unfortunatly it IS a big site so being passive won't realy attract people!
One thing I would chect out is the chats and the fourms.
chat.deviantart.com/forum.deviantart.com/chats of course would be for imediate response and fourms for longer , drawn out things or things you don't need an imediate response to.
A big part f deviant art and getting your work seen is groups!
groups.deviantart.com/I personally recomend
dawelcomewagon.deviantart.com/ hq.deviantart.com/&
steven-universe-fc.deviantart.…I hope this helps!