it’s actually great that you hit right before a new season. You’ll be able to use group finder for normal/heroics when s4 hits, then transition into whatever end game you want. That’s pretty much all you need to worry about. Rep/professions/collecting etc are purely optional.
edit: just saw your main focus is pvp.
- just start farming random bgs for honor gear once s4 hits.
- also once s4 hits, keep pvp mode on and farm war crates for bloody tokens for mid-level pvp gear. You’ll also want to craft season 4 pvp gear using whatever spark s4 uses.
- do whatever end game pvp you want