Awkward and uncomfortable in public

I've had anxiety since I was like 14/15, I was homeschooled since 2nd grade but always had social interaction with kids my ages, as I grew older I began to start feeling very anxious to socialize and I still am that way now, I'm shy as hell but struggle feeling even comfortable around groups of people my age. I don't know how to get myself to be more confident in myself and just talk to people and feel mess uncomfortable