Have you looked at some of the threads in the beginner/new commers sub forum?
Grainne often have a good response to other returned players 
Or some of the videos placed in the pinned
When I returned from my year long break I had no clue what to do, as my chars were all destroyed and the action bars were empty and every zone had changed.
I had to start from lvl 1 to understand the classes I used to play.
Have you unlocked WQ on that char?
The WQ gives a lot of XP so you faster can go to BFA.
I think you should take one thing at the time, so you don’t feel overwhelmed