always learn proportions!! people say anatomy this anatomy that.. no! you could have horrible anatomy and perfect proportions and itll still be okay! but perfect anatomy and horrible proportions... thats some trouble haha..
also dont be afraid to try anything! experiment a lot! explore whats fun for you... never let up on trying new, exciting things..
last thing, but most important, dont market yourself until youve developed a deep bond with your art.. do not make art to please anyone but yourself... to have your own unique style, your own unique taste, you must work towards yourself
good luck, and have fun! never be ashamed of being new :)