Blow job help

So. Me and my boyfriend have discussed pleasuring each other a couple time and we've done a lot of stuff, however, I haven't given him a blow job (which he wants and I want to give him)

Yet, I don't know how to start...

When we discussed it, he said that he would probably sit on the bed with his legs over the edge, spread out and then he would lay his upper body on the bed because I said that I didn't want him to look at me

But like... What do I do with my hands to start off with??

Do I give him a hand job first then put his dick in my mouth or what??

Help please?!?