We dont even have Amazon here in Finland

There is a YouTube lite subscription avaliable in some countries that basically only disables ads and dont have music and some other things. Its 7€/month in my country (12€ for normal premium).

yeah will take some time to get used to for sure

Shreddit is not malware so dont worry :) You should be able to do it on the site https://shreddit.com/ without downloading anything tho. If that doesnt work then try https://redact.dev/.

Chromium is open source and thats what Edge (and Chrome) is built on. So yeah you cant really say that Edge is directly open source I guess.