>>22680538Practise and patience!
First, don't cum. Obviously chastity helps. If you're a completely noobie, start with your finger. Your prostate is a few inches in, towards the front, stimulate it. Once you're fine with that. move onto something bigger. Toys are decent, a dick is better! Then find a position that works for you, some will some won't, and go to town.
Takes some practise before you'll get anything, took me about 2 and a half weeks before I got my first hands free orgasm. And, even now, I don't cum every time I get fucked.