Look for volunteer opportunities. In my town I found a litter-picking group that met once a week. Then through members of that group I joined another one that maintains flower beds and planters around the town. Then joined an effort to rehabilitate an environment project on a nearby farm, and ended up in the beekeeping team. Another group I was in for a few years organises gentle walks for elderly folks. I learned a huge amount from all these things, and none of it cost me anything but time.