Quill18 on youtube has both educational Let's Play series as well as a beginners guide to EU4
Quill is decidedly bad at the game, but he's a decent commentator.
Arumba is alright, and has been getting progressively better, although his CK2 skills are much higher than his EU4. He does well in explaining what he's doing, why, and why it worked or didn't work after the fact.
Maddjinn is pretty good, and he's a great commentator, but he generally only does LPs of low tech nations.
Marbozir is also a good commentator and plays a wide variety of nations.
Kailvin is a pretty good player, but his commentary style can be hit or miss.
Shenryyr is easily the best EU4 player on Youtube, but his language can get quite salty and he can occasionally rage a bit.
My main advice would be pick a nation, think of an overal goal and go for it. As you go you will notice new opportunities and things that hold you back, then for a next game you can start factoring these things in.
For example you can start a colonial empire as Castille and just set the goal of controlling a certain amount of land in South America. Or you can play as Austria and set as a goal to unite the HRE. As you go by you will notice that things are stopping you from achieving these goals and you can start to look into these things in a structured way and with a goal. This way rather than randomly reading or looking at things, you will start learning with a purpose. At least for me that makes it a lot easier to understand it.
Shenryr is the best EU player on youtube, but u should probably watch one os Quill18-s tutorial videos
I think Arumba made a short video for every part of the tutorial aswell as other important parts of the game, but imo they should only be watched if there is something specific you're wondering about, also the use of the wiki is helpful.
EDIT: Shen (Shenplays) is a native English speaker, has a play style with lots of personal flavour (decisions, wars etc.) but does tend to rage on mechanics/events/things he doesn't understand. This rage can go on for a long, long time, across episodes, which might become frustrating to players who happen to know why its happening. Definitely one of the top players on YT in general. I watch his vids on a daily basis.