Hand jobs

I’ve been hanging out with this one guy and he’s been very respectful of what I know is too far for me and I know he doesn’t care how far he goes. He’s been very sweet and hasn’t pushed me to do anything and last time we were hanging out together he had a huge boner but knew I wasn’t comfortable with giving a hand job or anything like that, and he didn’t even ask for anything. I don’t know if I’m ready to do anything like that, but if I feel I am ready I want to be prepared. How could I give a really good hand job, I heard that the wetter the better and Ik I wouldn’t wanna give a blowjob and he knows that too but any tips would be well appreciated for what to do!