>>114088 (OP)
Study the masters!
I cannot recommend it enough. The best suggestion I can give you is to read though and study someone like George B. Brigman or Michael Hampton. They have many books with hundreds of pages full of demonstrations and basically tutorials.
Now, obviously you're gonna have to draw to really grasp anatomy, so I suggest opening up one of their books, going through them and try to replicate what he's doing onto your own paper. Don't trace, freehand it.
If you have questions, I'm open
Happy drawing!