Being eaten out ???

So I'm 19, I've been single now for a year, the only guy I've had sex with was my ex. I've had hookups and fingered since but that was it. There's a new guy and he wants to eat me out but I've never been eaten out, I'm insecure ? I shave it all but you know shaving still leaves stubble and I hate that. And me and him aren't dating it's just a quick thing and I wanna hookup and do things but I'm always so insecure about sex and stuff with people. I'm just awkward and idk lol helppppp