what next? rock climbing!!!

So I have been wanting to tryout rock climbing for a long time and have never did anything about it. I don’t think that I want to be all hard core like the picture above. But I would like to take some classes to see if I would like to try to get good at it. However, I think that if I took a group class there would be a bunch of little kids and I would feel like a retard lol! But I think it would be fun to get a group of friends and take a personal class. Or something of the sort just so I can have someone to share in the embarrassment of trying a new sport : )