Honestly, I don’t think you’re alone in that, and I don’t think the game has gotten much better about teaching stuff like that.
I started playing a month after launch in December of 04. 11 years old and more than excited to play. I had no clue about any sort of guides or what rotations were, the difference between spell levels (at the time), etc. And I lived in ignorance for years unsure why some groups would get upset with me when I thought I was doing alright for myself.
Didn’t change until Wrath where I finally decided I wanted to get better at the game and quickly learned had been doing a bunch of things wrong, didn’t know about swing timers, etc. I certainly wasn’t great in Wrath, but my performance dramatically improved once I began reading guides and practicing rotations.
I think a lot of that still holds true for players today. Even with the new starting area it doesn’t teach you rotations, common terms like CC, interrupts, etc.
Tutorials are meant to hand hold and teach players stuff like that. But WoW’s version of a tutorial does not. There’s even memes about it over on reddit about it. One of the new quests meant to introduce players to emotes just tells you to wave at a particular NPC. But it doesn’t tell the player you’re supposed to emote, what an emote is, or how to emote. It simply tells you wave at them.
While my guide is admittedly geared more towards somewhat experienced players and not intended to be a guide for regular rotations or dungeon play in groups, I do intend to go over a few of the basics, common terminology, etc. The goal is to help players take on difficult world content by themselves reliably along with mythic dungeons or even raid bosses if they wish to really push their limits.
We all start somewhere, so I don’t fault anyone for having troubles or being inexperienced, and am more than happy to give useful tips or advice if asked! I just wish Blizz did a better job at explaining core parts to the game. WoW often assumes by default you know a lot about the game (or even games in general) when that may not always be the case and leaves players woefully unprepared in what can often be a harsh player environment.