Nerves are the things that help us. I can't recall ever going on stage without having a case of nerves to a greater or lesser degree. One evening--no booze or dope involved--I puked lots before going on. Got a standing ovation for the half dozen songs I did. I see nerves as things that require an akaido-type handling. Use them to your advantage. Learn that you have them and 'make them your friend'.