Starfish

SicMu Player is good. Its available on f-droid store.

https://gitlab.com/souch/SMP

i would go for the most used routers because they have the best support. look at the download statistics to get an idea of which ones are the most popular routers atm.
I just bought a used Archer C7 v2 because its popular and i could get it cheap in my area.

and check out this link: https://openwrt.org/toh/recommended_routers

This. Trusty old lawnchair2. I can group all my apps in folders and have a separate menu for island/shelter apps.

Its beautiful. How did you get that scissor icon (guess its a screenshot tool?) and whatsapp in your systray?

Any distro is good for privacy. Try out OpenSuse Leap or MX Linux with KDE to get a windows-like experience

diablo 4 when?

Debian Stable is a solid choice as it has the best support and is a hassle-free experience. Maybe with KDE Desktop. Its the most userfriendly windows-like desktop i know of.
Optional: You can also install the MX-Tools from MX Linux to get some comfortable GUI system tools.

grsync, its easy to use

OpenSuse Leap. In YaST (its system settings tool) you can do everything from a GUI. No cli, no config files, no tinkering.

Just use a second phone for that proprietary stuff. So you dont have to comprise privacy/security on your main/private phone. Also a huge fan of xprivacylua to isolate proprietary apps and feed them random data.