I would suggest you to ask on official Nobara discord. I got help right away.

Never upload your passwords to any cloud. Always use good foss instead of proprietary software.

Use Aegis on android or 2FAS on iOS. And just backup your seed on hdd/usb stick. Dont upload on cloud.

For spider man recommended gpu is RX 580. I would suggest you, of course if you can afford, to go for RX 7700 xt or 7800 xt. You will be more future proof.

That all depends on what games you play. Do you want to play new AAA games or retro? Indie? What is your budget? XT is stronger version of regular 6600.

I don’t think there will be any issues. On that note, use open source AMD drivers. You dont need proprietary one from their site.

AMD all the way. Few weeks ago I finally made a switch from Nvida for the first time. I have no problems in gaming. All games that I play run same as on windows.

Thats just the 1st step and easiest. You are far from degoogling. Remember, you are still using android. If you are really up to go check custom ROMs for your phone (of course if it’s compatible) I would suggest you that you take your time with this and dyor. And what about your pc? Win or mac?

As for your question. When i was on android I only had F-droid (almost all apps that i used were from there) and I didn’t bother with Aurora because only apps that i had from Google store were banking app and steam.