I agree with the other about chafing being an issue. If you are concerned about the oil based lubes requiring washing off and so killing the moment for other things, then just find a small pump spray bottle to keep warm water in so the you can quickly re-wet the lube with one hand.
Here’s some techniques for you. If you grip his shaft below his glans, firmly enough to avoid your hand slipping on the skin, but not enough to " strangle" his shaft then draw your hand up and down, so that it takes the loose skin of his shaft up over the coronal ridge, and back, sort of like a mock foreskin. Just lube the glans, and try not to let the lube get on your fingers, as you will lose the movement of the skin.
Two handed:
1: If he has enough length, you can use both hands at the same time. Use an up down movement, while at the same time counter rotate your hands, particularly over his glans.
2: Interlink the fingers of both hands, so the finger tips of one hand touch the base between each finger of the other hand. Bring your thumbs in to form a hole (You can control the size of the hole to suit) put your hands over his shaft, and slide them down below his glans. When you bring your hands up spread your elbows out so that you can rotate your hands at the wrist to take your interlocked finger up, and over the top of his glans. So that he gets a sort of bumpy massage on his glans.
He will likely use just one of his hands at all times, so he will be used to the feel of that. If you are able to straddle him so that you can use the same hand from the same position that he does, it will match the feeling he gives himself, if you get me.
Use one hand and your mouth at the same time. Combine that with anal or perineal stimulation, if he likes that.
If you get him to lay on his side and arch is back, you can kneel behind him, so that you can play with his nipples, or balls, with your free hand, depending on which side he lays on.
If you can straddle him you can combine a hand job and a butt cheek job, by holding his cock between your butt cheeks with one hand, while rocking forward and back, to draw his shaft up and down.
Circumcised guys, become less sensitive so it will be a longer task. If you can find ways to stimulate his mind at the same time, that will help. Such as giving him sexy eyes as you give him a BJ. Warming him up first with other things will get him a bit closer too. Sort of HJ/ BJ foreplay.
I can give you some BJ techniques as well if you wish.