Need help please.

I’m 16 and I’m afraid to do anything that involves talking to people. I wanna go to the gym but I’m too anxious, everytime I think about signing up for a membership I get overwhelmed with all the worst things that can happen. I wanna get a job, but everytime I think about applying for one I think of all the worst outcomes. and how I can’t talk to people. I stutter and turn red sometimes when I try to talk to people or try to have a conversation. I shake and get sweaty when I go to the store to pick of groceries for my mom. i literally shake and get this weird feeling when I talk to anyone on the phone. I literally cant do anything that involves socializing without sweating, shaking, and getting this weird feeling in my tummy. I wanna do all the fun stuff, but i just can’t. and I hate myself for it. I can’t do anything. can I get better? I’m really suicidal, I don’t wanna kill myself. But i feel like If i can’t even get a job or socialize, how am I gonna get anywhere in life? Please give me advice. Thanks.