As someone who has initiated first things with men, I don't mind a dom MC! I'd love it! You said you wouldn't make the choices MC does, but I'd go further to say that no one would.
Because the way she's written right now, I don't see a dom MC, I see an annoying horndog teen trying to look "cool" towards her first crush by being obnoxiously rude and loud with "big dick" comments, like that's all he's good for. Their "relationship" so far is awkward pent up shallow sexual gratification at best. I don't know how she's supposed to be dom, and if her acting like that is supposed to be one, I think it's not a great representation of it sadly.