What I have learned from learning is that you learn better when what you learn is immediately useful to you, possibly because it helps appreciate why it is, as it is. RegEx are incredible, but they take some time to get into. For now, I’d say, you can be satisfied with what you HAVE learned, among other things: RegEx exist and they are a powerful way of finding and replacing text in more text. Eventually, you can revisit them, work on a small project involving them and learn to appreciate them.
I always have a list of things in my head that I don’t know yet, but want to learn It tends to get bigger over time, but that’s ok, I don’t wanna run out out things to learn.
PS: I love MDN, but a lot of beginners seemhave similar problems as you do. I guess its the terminology and wording that makes it hard for people who haven’t read lots of documentation. I’m sure you’ll get into that over time, if W3 schools works better for you, there’s nothing wrong with it. (I’ve heard they worship Satan but who cares, right? )
On the mountains of truth you can never climb in vain: either you will reach a point higher up today, or you will be training your powers so that you will be able to climb higher tomorrow.
– Friedrich Nietzsche
(That’s a relief!)