First date nerves

So the other day I matched with this guy on bumble and we really hit it off, like really. He asked me on a date for this weekend and I’m really excited but also terrified. I’ve never done anything romantic or been with a guy in my life and so I’m totally reeling thinking about all the stuff that can go wrong or how I don’t have any idea of how to be on a date. I’m also really nervous because I’m really insecure about my weight and this guy is really cute so I’m nervous that when he sees me in person he’ll be really disappointed by my appearance and not want to see me again even though I’ve unfortunately already caught feelings (i tried not to). I don’t even know what advice I need but I just feel like my head spinning