How about Cron? If it’s just for copying your files / data, super easy to set up and extremely rapid, it doesn’t do snapshots, it’s just a simple ‘copy my file to another place’, but it works 👍
Use timeshift, install it, just chose where you want the backups to be installed, preferably a second HD or SD Flash. Chose when like once a day, week at start up for instance and forget it. Then if you screw up your Linux, just start in console mode, timeshift --restore and five mins later your up and running.
If you want just your data to be copied, then Cron
Both are standard Linux programs, often already installed depending on what Linux you have
Grab a second SSD or HD, that way, keep windows in one as it will be probably be supplied with the computer. Add Linux to the other disk, Debian maybe, EndeavourOs much better. ThNo dual boot. And when starting to computer just choose which disk you want to use (F8 or F12 often) and later if and when ready, you wipe the windows HD and use it for backups
I’ve stopped using lineage as i changed the pixel3 for a 6a, so stock android. Although at the time I could get PayPal to work my banking app was a no no
It sounds like the best option would be a dual boot, Linux for everything except games and when you want to play just boot into Windows. If you do this i would strongly suggest a two HD set up, one for windows and one for Linux, for two reasons, if you don’t like Linux then you still have the original windows setup, two Windows will at one moment wipe the dual boot grub and you’ll ‘lose’ the Linux startup, unless you have one OS per Hard Disk. I don’t game anymore. Like you I also have an old card Gtx760 🤣🤣
Try Lineage. I ran it on my Pixel 3 for about two years when Google stopped updating it. Then when I decided to sell it, just reflashed the Google OS back on it
Like you i switched from about 30 years of windows to Linux almost three years ago, Ubuntu, Mint, Manjaro, Endeavour before ending up with Arch which I find perfect. I also have two PCs running Debian for HomeAssitant setups in two homes but I don’t like Debian I sometimes use my wife’s Windows setup for Garmin Express as that’s the only windows program that I need. So keep on going, Windows is not missed,
I’ve used Joplin for years now before was Evernote. I like it because it’s open source and the syncing option is built in, exemple either to Dropbox or NextCloud (I use both these options, DB only because I have a free option of 12gB otherwise I would use just NC) The syncing is painless as as I said built-in. It’s not a pretty app, fairly plain, but it works perfectly, on my android and Linix PCs, Arch and Debian. I did try Obsidian once. It’s pretty, but not being open source put me of. Try it again, takes minutes to set up, as again open source and works well
I don’t use Trillium, tried once Obsidian but it’s not free. Have you tried Joplin, it’s free works extremely well with Dropbox or NextCloud for syncing between téléphone and the PC. For note taking its extremely good
Timeshift. Easy to set up. Easy to use, only takes a couple of minutes to ‘re-set’ your system back, if you break it. If you want just to backup files, documents etc then Cron. I use both. They are standard Linux programs and easy to use