It's really odd. While I have extreme performance anxiety when it comes to work and other activities, I love being on stage. I think it is because I can escape who I am and don't have to worry about being judged for being me. I look forward to putting on another 'mask'. Perhaps you will find the same experience.

Try a Catastrophic thinking worksheet. Basically you list off the worst case scenario and compare it against lists of the best case and likely cases. The latter should turn out to be the longer. Then go back to the worst case list (which ought to be much shorter) and strategize just what you would do if it were to happen. The result should be some new found confidence in the endeavor.