Someone mentioned why not just follow subreddits. I noticed that subreddits are often a collection of the extremes of a hobby or interest. I would say that I'm a collection of interest that make up my unique personality, while subreddits often have people that are really deep into a specific topic.

One thing to note about your idea, is I've used apps in the past that connect you with people that you share interest with, but I often flake when it comes to actually meeting with people in person... I wonder if this is a common trend? I feel like I almost ended up using them as a self validation.... but never followed through much with meeting people.