Naw, you'll be fine for the climbing stuff, obviously being aware of age gap stressors. Under ~25 it seems like age matters a lot, over 25ish is kinda whatever.

Bars alone can be weird. I've made several friends at bars but I'm very passive and kind of a long con kinda guy.

Show up repeatedly, become a familiar face. Talk to people, general chatting. I became casual friends with two bartenders over the last 3 years. It takes time and a certain level of savviness.