Hm, that might depend on were you live? If you're not interested in organizing something yourself you might wanna look what groups there already are.

I don't know if your city has charities that organize low/no cost workshops? We have tons of those here. And the local Antifas are also quite active in organizing stuff for people without money.

Other Ideas:

Going for a walk with a fix group, playing some sportgames on an open space,

role playing games doesn't have to be fancy with cosplay and stuff. Pen and paper can be all you need. And there are pretty awesome ones out there, too

Dancing or playing theater in amateur groups can be very inexpensive and therapeutical

Hackspaces are free for all

walking dogs for others might even give you a bit of a bonus money (and believe me, you get to know a lot of people with dogs.)
- If you're to shy asking people directly for a regular meeting, just walk at the same place the same time. Dog owners tend to have a pretty regular schedule and, at least here, you have to actively avoid social contact if you don't want to get to know them.

I guess volunteering is not an option due to the money issue? I mean it doesn't cost, but it doesn't get you money either and costs a lot of time.

Maybe others have more ideas?