Kakertratte

Yes. And yes.

With Street complete you can contribute to openstreetmaps by entering data for things in your proximity like house numbers, pavement types, directions of lanes, height of buildings and what not.

With the stealth app available on f-droid you can view all content without an account.

Its what i use for occasionally reddit browsing and viewing nsfw content on there.

Look for releases on the sites of the groups / ppl releasing them. Most offer trackers they seed to.

Other than that and private trackers, I like torrends.to to meta search for torrents, but there proceed with caution.