Am I too late/old to start?

I’m a 37 y/o attorney and completely miserable with my job/career choice. I always dreamed of being a standup but never had the balls to try. I recently lost my mom and realized that I need to give standup a shot before I’m dead too. I’ve been going to open mics near me (just watching for now) and every performer is in their 20s or younger so I worry I’m just going to be too out of touch to get started.

Edit: just want to say thanks to everyone who responded here. You all have inspired me to go tonight and put my name on the list for the first time. Here goes nothing.