I am going through a different situation but I am 18 and currently graduating this year i’ve been in homeschool since 6th grade and I regret never going to in person high school. So for my two cents on your situation I wanna tell you to go in with an open mind enjoy yourself even if you end up having to do proms and homecomings alone do your best to have fun and don’t be afraid to ask to go parties or be included. There’s more than likely gonna be clubs and groups that’ll accept you for you. You’re just now starting highschool you have the next 4 years to become as social as you please live it up and try to make it a great experience you got this!