How do I give a good handjob?

So I've just recently started to touch on sexual pleasure with another person. Normally I only touch myself but I finally found I guy that I trusted with my body. I want to know how I can return the pleasure he gives me. I'm really shy about sexual things so I thought it would be good to start off my giving him a hangjob. I have no idea how to give a good one though considering I've never gave one before. Can anyone give me tips on how to make it more pleasurable for him?