Oh man, you’re in for a rough time. Nearly anything you mentioned is controversial in Linux, it is highly opinionated technology.
Just go into this with an open mind and don’t take things as gospel, always remember, only Sith talk in absolutes.
Plenty of good content on YouTube, personally I like people focusing on technological aspects.
https://youtube.com/@titustechtalk Titus has a lot of mixed content, best to just scroll through his videos for specific things you are interested in.
https://youtube.com/@michaelnroh Michael focuses a lot on DE and is quite insightful about them.
https://youtube.com/@stephenstechtalks5377 Stephen isn’t very active recently, but his older videos are still gold and almost reference material when they impact something you want to do.
https://youtube.com/@christianlempa Christian is all about docker, podman, kubernetes and networking. If you want to do something related to that he probably has a video about it.
https://youtube.com/@a1rm4x Linux gaming, how to set it up, livestreams etc. He actually knows what he is talking about, not as knowledgeable as others in this list from a technical pov but you can tell he compensates with pure time and effort.
There are a couple interesting browser these days, for example floorp. It’s always interesting to check who is behind a browser, in the case of floorp it’s a Japanese company which I like.
They might still pull a corporate fast one on you, but at least they will apologise profusely over it. It’s also genuinely a nice browser, obviously fully open source and privacy focused. I think it’s a nice filter between my browser and mozilla which lost some trust from me over time.
They are deprecating the underlying technology(called manifest V2 or MV2 for short) and replacing it with a different one(MV3) that lacks some of the capabilities for some kind of adblocking.
So yeah, it’s pretty much dead on chromium. The developers of brave have commited to provide a best effort support for their browser though: https://brave.com/blog/brave-shields-manifest-v3/
Firefox on the other end has no intention of deprecating support for MV2 so any browsers based on that are fine. Keep in mind MV3 supports some adblocking and some Adblockers have already moved to it, it’s just a lesser extent.