I’m in the process of (very slowly) migrating my household from Windows to Linux and am currently testing Nextcloud as a replacement for OneDrive. In my case, I set it up using pikapods.com because I want offsite storage. The server part of the setup was incredibly easy because the host did all the work.

Getting my Linux client setup was kind of a pain (especially compared to the Android and Windows clients), but everything seems to work ok so far. Of course, I’m only backing up a small amount of data so far, so I can’t comment on the efficiency or speed for a major backup.

I use a budget app for tracking income and spending on a transaction basis and then keep the rest of my finances in spreadsheets.

Mine is off at the moment.

I don’t have a Linux PC, but I have Skyrim heavily modded on my Steam Deck. It has been quite a while since I set it up and I know very little about Linux, but if you search for tutorials for Steam Deck instead of Linux, you might find what you need.

I’m definitely using SKSE and this may or may not be the guide I used to add it: https://retroresolve.com/guides/install-skse-on-steam-deck/ (I don’t remember the details, but I spent several evenings getting all my mods set up when I first got my deck).