Where to meet nerdy women?

I’m looking for someone advice. I’m a 34, average looking guy. I’m not going to act like I am super confident, but I accept the type of person I am. I don’t have trouble talking with people casually. My main struggle is I have no idea where I am supposed to meet women. I’m a pretty nerdy guy and am really looking for a girl with at least some similar interests. Any time I find a girl I take interest in, it seems she is already in a relationship. I’m okay with making another friend, but I’m not lacking in those. I’ve tried and still trying dating apps, but they’ve not helped in the slightest. I go out often to do my hobbies, but they are male dominated and the few women already have a significant other. I just don’t know what I am doing wrong. I feel lonely and it’s hard not to think about. I know this is kind of all over the place as I’m typing off the top of my head. Basically, is there anything or anywhere that can help me? I feel like I’m getting old quicker and quicker and I feel depressed when I think about it.