No idea, but here is a guide
You should be playing through the 3 zone content and the war campaign since both comprise the main story. You can tell where you are in each zone as the quest log has a checklist of each zone's "chapter" or storyline. Once you finish all the chapters, you get an achievement for the zone. You will also rep up at to revered while doing that which is useful, but not necessary. You need all 3 zones, revered rep and the war campaign to even start the flying questline.
This is the alliance version:
https://www.wowhead.com/achievement=12593/loremaster-of-kul-tiras
If you just want to power to 120, do at least 1 random dungeon a day or wait for timewalking. Every two timewalking runs is 1 level from 110-120. It's a great way to get a second 120 fast. Grab a DH and tank TW power runs from 98.
Also for rep and xp, the anniversary event usually has a reusable token that gives 10% xp/rep. It should start around 11/15.