If you already bought a ton of books:
Use them, but don't copy them.
Most people misunderstand the purpose of such books.
They try to teach a set of steps that can be used to
go from a bunch of lines and circles to something else.
Sadly, most people just learn how to draw horribly cliche schoolgirls
and samurai in colors that make you want to punch out your own eyes.
I usually just glance through those books at the store,
absorb as much of the actually good tips about clothing
and anatomy as possible and then put them back.
The best, PROVEN method to drawing anything well?
P r a c t i c e.
Draw every single day, all the time.
There's no miracle tip that anyone can give you
that will make you a genius. Work hard!
Good luck. c: