How pvp work in legion

Hello guys how does arenas and pvp work in LEGION I haven't been playing much pvp and I am not even prestige 1 so far. However I would like to start doing ranked arenas are they better for grinding prestige lvls ? Because I see honor gained 0/1500 in it does it mean you can do only 1500 honor per week or what does it mean ? And I would like to find some partner there if possible I play on twisting nether I am frost DK and I am not very experienced but I think I am not that bad and I am up to learn new things so if someone experienced would like to play some arenas mostly for fun I would be happy. I always prefered 2 dmg because with healer its so slow and I hate dealing with healers :)