Guys, First blow job question?

[Super2000]

im about to give my first blow job. I have been hooking up with this boy for a while and he has fingered me. Typically we just make out and sometimes I'm on top and can feel how hard he is. I know that I'm ok with giving him a blow job, and he is the one who asked about it in a nice way and say he cares about me too much to pressure me to do something if I don't want to, but if we are making out how do I lead into giving him a blow job? Do I take his shirt off and start kissing down his stomach and chest and pull his pants down? Or do I literally just look at him sexy and say "wanna take your pants off?" Like how do I lead into this? Also how long does a typical blow job last? Do you have to wait until the guy finishes? And how long is the average blow job?

[Anonymous]

watch porn, it'll give you creative ways

[Anonymous]

What you said first, I don't know why but it's better when you just do it instead of asking