Honey, really, I'm BARELY Intermediate level. You wanna be as good as me? take some notes, doll:
1. To learn anatomy and perspective, use sites like Posemaniacs.com when you draw someone. Try to find a pose as closely related as yours.
2. Check out outfits online. Like, if you're drawing a dress, look at some dresses. Watch how they fold. I'm still an uber beginner with clothing.
3. Figure out where you wanna go with your style. Like me, I like thick poofy hair and giant eyes.
Just keep your eyes open, ask for critiques, listen well, and learn, learn, learn! Like, say I critique one of your arts. What do you do? Draw over it and fix it until it's right! You can learn SO MUCH from just doing that. Thus why I BEG for critiques.