Blowjobs?

I've never given a blowjob but I'm pretty sure the guy I'm kinda interested in thinks I have. We've been flirty and I really do want to be sexy-friends with him😂. I just want to know some, let's say, proper etiquette for blowjobs and how to seem more experienced than I actually am. (I know you're going to say just tell him you've never done it but I don't want to do that, please respect that!)