Speaking as a man.......
Men are visual - they want to see what is going on, remember this, it's important.
Hand jobs; a fact. You will never, ever be as good as he is at this. He's had a little more practice than you. However, not too fast, no jerking up and down, lube is good, but here's the most important bit, the grip should be firmer toward the base/pelvis, not toward the top/head. Otherwise it feels to the fella like you are trying to milk a cow. So your little finger is gripping tighter than your index finger. Not too tight and don't squeeze too hard on the vein on the underside of his cock, that can hurt.
BJ's; a fact. (Nearly) all Bj's are good. Because most guys have never, ever had their cock sucked enough, so it's (nearly) all good. There are several important things - no teeth, ever, EVER!, lots of enthusiasm, lots of saliva, lots of enthusiasm, lots of eye contact, lots of enthusiasm. Oh, and lot's of enthusiasm. If a bloke thinks you aren't enjoying it, and are only doing it out of duty, then he won't enjoy it either.
As for licking the Frenulum, this isn't always a good idea. A lot of guys break this when being young and stupid and wanking too hard. Or a young and overly eager girl slams her hand down too hard with no lube and a tight grip, (yes, experience, and lots of blood) so guys who have suffered this in the past might be a bit sensitive here.
Lot's of eye contact and a scrunchy and you can't go wrong. There is nothing duller than a girl draping her hair all over your cock, to obscure the view, while she's giving a poor hand job and briefly licking the tip of your cock, it's best you don't bother.
On the other hand, kneeling in front of him (if he's sitting up) looking into his eyes while you suck him? Fantastic. He will think you are a Godess.