I was transferred to online school because of anxiety, but now I feel isolated and don't have friends

I started going to online school this year due to issues with bullying and social anxiety at my old public high school. My grades have improved a lot, but the main problem now is that I never leave my house, and so I've gotten worse at talking to people since I never have to. I'm slowly driving myself insane from being alone, but I'm not sure what to do about it. The people in my classes seem nice and I'd like to get to know them, but how do you get to know people you never talk to outside of class and that you've never met in real life? I can't even order my own food at restaraunts without triggering a panic attack, how do I make friends when I never leave my house and I don't know how to communicate with my classmates?