my anxiety is getting stronger

hi,i'm a 18 yo closeted gay boy who never had a bf or even flirted with someone and is about to go to college,i'm also not very confident and not very good at social skills,but the reason of this is my mom pretty much sheltering me if that's the right word, she wouldn't let me do a lot of things to protect me and never gave me a chance to try,fail and grow up. i'm living in a homophobic country and i'm about to move to a dorm. i'm pretty anxious about my future like how will i bond with the other people in the uni,how will the dorm stuff go, how will i flirt with a boy i like etc. i'm just too anxious even though there's like a good month for me to start college, i wanna be confident and improve my social skills and live the life i wanted always but i'm also scared of growing up, the thought of just like growing up improving my social skills interacting with people,getting a job,living on my own and becoming a fully adult is scaring me,idk why maybe i'm scared of not being able to move out of this country and maybe i don't wanna die alone, or maybe i'm just not ready to grow up or both idk. can you guys help me on how can i be confident and how can i improve my social skills and if possible how can i glow up lol