Painfully Shy

I have known since I was young that I was attracted girls. Crushes on best friends and never interested in boys so it was very clear in my mind. However, I’ve never had a girlfriend and am really struggling still as a 28 year old that is pretty outgoing at work but when it is time to try and put myself out there I clam up. I’m also really nervous that if I did talk to a girl and she found out I had never had a girlfriend she would think I was lame. I am just looking for advice or opinions on how to get better at talking to women/what your reaction to my singleness would be?