I’ve been happy not using Amazon since 2010!

For paper books, find a good local bookstore first. Then for online ordering, bookshop is good. B&N is iffy ethically - they helped crush a lot of smaller stores in the 90’s, but they aren’t part of the current tech giant oligarchy either. Target will usually have a section of best-sellers. If you have to buy from a big store, maybe offset it ethically by donating to a library.

For ebooks, Bookshop is good! They point out which of their ebooks have DRM and which don’t. For some cases, you can also buy books directly from the publisher - these basically never have DRM in my experience. I mainly experience this with technical books and tabletop RPG books.

ProtonMail, or the Steam game compatibility layer?

It is available on F-Droid, if you add its repository. QR code here: https://gitlab.com/ironfox-oss/IronFox

Steam Deck owner here. The default browser is (or was?) FireFox on my Deck, no Chrome.

Code Vein is a Soulslike with an excellent animé-style character creator.

Morrowind has mods that make characters prettier (this is an understatement). I highly recommend them.