[NSFW] Tips on Drawing?

I was considering starting to draw R34 but I’m not quite sure where to start. I was wondering if any of you could give me a few pointers on anatomy of any kind.  
Thank you! :)

Obtain anatomy textbook.  
Obtain classical nude studies.  
Obtain social skills and coerce for models.  
???  
PROFIT

Watch porn, but not just to watch porn, to study it and watch how things work and look in real life situations. This is what I’ve been doing, and I’ve seen so much improvement.

Google image search.