Some advice pls i don’t why I feel this way.

Long story short, i have been seeing this guy for about 3 weeks. Yesterday, we hung out at the beach and we talked for a long time. Then once we were leaving it started getting more sexual.. we ended up making out a lot in my car and he gave me a hickie. Which i do not like because my mom told to no come home with one ( he’s 25 and I am 22) I live with my parents and still have to obey there rules, it’s just how it is in my culture. I have a hickie and I already put make up over it, but I am feeling guilty about what I did and a little ashamed because it was my first time doing anything at all. I really enjoy my time with this guy, he makes me feel heard and we can talk for hours. Idk why but i feel scared and hesitant to move on forward with our relationship because it is so new for me and so weird, but in a good way. Is it normal to feel this way during your first relationship ever? Like i feel scared, nervous and excited all the same time. I really do struggle with change but any advice on how to control that anxiety and be open to this. Thank you i really appreciate it (: