The easiest step to being likable onstage is smiling. That’s it. If you can do that you’re soo much closer to the audience liking you.
Smiling makes you look like you want to be there and you are having fun. Yes, there are times you don’t want to smile, and those times should be well thought out. Your default should be a smile.
Many years ago I heard an interview with comedian Neal Brennan on Tom Papa’s podcast Come to Papa. He mentioned that he thought he was smiling onstage, but realized he wasn’t. Onstage you need to smile bigger than you think you need to for it to play to the audience. Hearing that interview really helped my show!