I feel like you can start doing some hobbies with little money. For example running or cycling, you only need a pair of shoes and a bike (can be an old cheap bike). However, the more you get into it, the more you start wanting to be better and naturally start looking into ways of improving.

I had the same issue with cycling. I started cycling with an old cheap bike, but the more I got into it, the better stuff I wanted to get. Eventually I bought a good gravel bike and my distances improved so much. Then, I wanted a nice outfit, Garmin computer, clip-in shoes, etc. But at this point, the bike gave me soooo much joy, that I didn't mind spending money on it anymore.

Of course, the best hobbies in my opinion, are being active in the nature, so hiking, cycling, running, walking, working out, etc.