I've noticed it at your profile I'm a ferm believer in Practice when it comes to art. But confidentially speaking, and I hope I'm not bothering you too much, what DO YOU think about my Gorilla ? Honestly.
Drawing anatomy very difficult - first of all ypu should to learn simple forms like a shard, cube, cylinder - all composite form consist of small simle form. Don't try to draw difficult form without knowledge and practice in simple things. Found basic drawing lessons I sure it'll be usefull or better to go in art-school or found art-teacher.