Hi Charles: Learning while performing is a "bridge too far" for me to even consider. I do my own demos of the songs I write but never perform in public... so I can sure understand the tremendous pressure you feel. In my case, recording in my tiny studio... alone and unfettered, if I mess up... I simply start the whole process over. The keyboard has been set up in advance, all the instruments needed and multi-pads desired for crucial parts are selected and waiting to be used. Now if only I can muddle through the vocal and end up with a decent recording to play for a limited and ever-shrinking audience.
Hang in there. Practice makes perfect and you are very brave in my eyes. Regards, ----Dave Rice
www.ShowCaseYourMusic.com/DaveRice/