Most of the good geared people let the teams down in PvP anyway so don't ever worry about that, aslong as you pick up the "how to play" the specific battleground your in and do it you will never let the side down. Guys camping GraveYards in WSG whilsts some guy caps flag is letting the side down xD
Or battling mid in WSG whilst the opponents cap flags is letting the side down/
Do random BGs, to learn the BGs. Do Arena with a friend to learn how to play your character to its best in higher level PvP
Leatherworking in 5.4
With 5.4 arriving next week, leatherworking gets a new item which is going be used for season 14 blue pvp gear recipes and epic pve recipes. Don't know whether that interests you if u need to stock up on anything pre hand before next week so you can make yourself lots of goldz