I'm new, too. Pretty sure I'm the same way, in a mild form. Can act on stage, can perform physically, can teach, can even keep going with a conversation once started, but am extremely nervous (fear of how they will react/rejection) about starting a conversation when I don't know people, or making myself the center of attention when I am unsure what my role is. I won't even answer the phone if it's my husband's family, because I have no clue what to say to them, and I get a bit nervous, so it's easier to hand the still-ringing phone over to him. HATE making calls to people who aren't good friends. And I have so much trouble understanding my role in interactions with other peoples' kids that I act standoffish, even though I enjoy kids' company.
While that doesn't help you much, I know how feel, and maybe that helps a bit. And I'd be happy to talk with you sometime.