Stick with Fedora and Nobara, they are good distros. I use Arch myself, because I like that bleeding edge, bro - but if those other distros are working for you, there’s pretty much no reason for the average person to switch.
Yes, Real Debrid (RD) functions as a leech. However, in essence, RD typically only needs to leech once for widely sought-after content, storing it in a cache for quick access by any RD user.
In the worst case, RD may need to acquire less popular content through a few hit-and-run instances. RD actually contributes to minimizing leeching - if each RD user torrented independently on public trackers without seeding, the situation would be more problematic.
It’s usually pretty easy to find secondhand Microsoft Surface devices for that price point (check craigslist, FB marketplace, and the like), and they absolutely rock when using a Gnome-based distro (like Fedora).
Calories burned from running isn’t that great of a return.
An estimate is that a 200 pound person burns 792 calories per hour running at 5mph (12min/mile, or 8kph) on a firm, level surface. A 140 pound person burns 555 calories in the same scenario.