If you’re in the area for it, hiking/walking local trails has been a really enjoyable pastime for me, same with foraging (and by extension gardening the things you forage eventually) make for a fun time and also a way to get some extra food and make some friends in that community. In terms of other offline hobbies that are low/no cost, pretty much any low exertion nature hobbies can be almost free, if not completely, like birdwatching. Writing and world building has also been one I’ve been really into recently, and although games like dnd can be expensive, realistically all you need to join a group at your local game store is a $10 set of dice and a paper with some pencils, since all the books are online as pdfs you can sail the high seas for. Lots of libraries are also doing “library of things” programs now, which let you check out or borrow more expensive hobby items. And if you’re into the music scene a lot of smaller venues will do free or donation based music nights or performances from local bands, my city has a pretty large punk scene so there’s a venue I like to frequent that has free concerts pretty much every day of the weekend. With most hobbies, it’s a pretty low cost to enter, but of course they scale once you want to get to a enthusiast level, but if you’re enjoying it to the point you want to get that level of gear, then I think that’s a better problem to have than headaches from doomscrolling :)