Recommended cameras for beginners?

I want to get a camera that I can use mostly for nature pics and graffiti pics out the window of a moving train, and maybe a butt or two (consensually ofc). Yes I know I'm weird. That said I guess I'll need a "fast" one for the train, if that is the correct terminology (I think for shutter speed, yes?) The only other requirement is I will not download programs or apps beyond FOSS, preferably something I can just take the SD card out of and plug it into my laptop (linux anyway, most programs don't like me).

I don't see myself making this my living (and if I do then I can always upgrade) just as a hobby and maybe some side hustle if the opportunity knocks, so I don't need the best camera, but I would rather buy nice not twice (unless I leave "hobbyist" and move to "professional"). That said I was thinking maybe a DSLR would be enough for me (if not, I could be persuaded to mirrorless, just trying to keep costs down)? I've heard good things about the Canon Rebel, idk. I'm not really trying to go over $1k (and even cheaper than that would be even better) especially if I have to then buy a lens or two.

Any recommendations are greatly appreciated, I have no idea what I'm doing lol.