Any tips on hand jobs or blowjobs!

I was talking to my BF last night and I asked him if he gets annoyed or bothered that I don’t feel comfortable doing certain things and he said it doesn’t really bother him but he wishes I would do stuff sometimes.

This is my first relationship like this and I don’t feel totally comfortable only because I don’t know what I’m doing. I told him that I wanna try stuff but idk how. And him being so nice about it honestly made me feel worse.

My arm always gets tired when giving him a hand job and I’ve never tried a blowjob.

I hate that I don’t return the favor when he does stuff for me.