new to the game, where to start?

got AOE2 HD and i’m wondering if there are any good resources (youtube videos specifically) for beginners.

played through the tutorial but i feel like i can still learn a lot more about the game.

any tips/useful hotkeys and general information every player should know would be nice too.

also is it a good idea to play through every single campaign first before i get into the more serious/competitive stuff?

(keep in mind i’m also fairly new to RTS games as well. the only prior experience i have with them is RA2)