How much time needed to unlock flying?

Hello, a bit of context first; i've been away 7 months from the game and just got back this week. Much has changed, and the flying is finally here. I swapped mains just before i quit, so i have 0 progress on Suramar. How much time would i need (more or less, reasonably) to finish Suramar + BS requierements? Is there any guide like Zygor to track which quests i need to do etc.? I'm an ilvl 887 Fury warrior btw.