I feel stuck in my career. How can I find a (good) mentor?

I feel stuck. I don't even know if I want to continue working with tech. The more I read and research, the more useless I feel. It may be some sort of "impostor's syndrome", I don't know, but I just feel like I'm doing the same thing over and over again and that I'm not growing as a professional.

I've tried doing 1:1 with my managers over time, but it didn't help. I've also tried signing up for Career Advices on LinkedIn but it also didn't help (it was mostly showing up managers from fields other than tech).

How can I find a good mentor? I think I need someone with a similar background and more experience to talk and (may) help me find goals I want to pursue.

I can give more details if needed.