Looking for a desktop environment for my media pc

I control my media pc running Popos with a remote mouse/keyboard combo I found on Amazon and while this works pretty good, I would like a more "big picture mode" like experience that works well with using a remote.

I know theres some distros out there that are geared specifically for a media pc but I don't wanna reinstall my system. My internet is painfully slow at times and drops out frequently (yay for rural America) so even doing system updates can take a long time or just time out. I'd rather not babysit my pc to get everything working again how i want it so if I could find just a desktop environment to use that would be great. If not, such is life.

So far, Plasma bigscreen looked the most promising: https://plasma-bigscreen.org/ but any recommendations would be helpful. I've tried looking some up myself but searching the web has become pretty useless for something more niche or specific like this and I figure the good people on here would have better advice anyways.