Honestly if you want to try it on Firefox, they have a few options built-in for alternative DNS !
And I feel your pain, my CS bachelor's had like 0 courses on Networking, fortunately my current Engineering degree courses have great stuff available, so I'm finally catching up !
Comment sections removed ? That should be a feature !
I had an extension that removed those, amongst other things, but that part broke. Most video comments on YouTube are incredibly stupid, I'd rather just not have to see them.