New Boyfriend. Please Help.

Okay so, I recently started talking to a guy and we're basically together now. We've been talking about things we'd like to do together and sex was brought up.

I'd love to have sex with him, and it wouldn't be my first time, but I'm still pretty new to it and it's been a year since my last time.

Also, he's skinny and I'm on the bigger side. I wouldn't call myself overweight, but I definitely am bigger than him and I was wondering if that would affect anything.

I'm also wondering if there is a way that I can get birth control without parental permission. I'm 17 and he is too. We'd use a condom, but I'd like to have some extra protection.

I just really want some tips on sex in general, how to have good sex, etc and also on how to just be more comfortable during the whole thing. TIA ❤