If you start playing at release I don't think it will really matter. I wouldn't try to level to 60 only using pvp. The fastest way to level is going to be solely doing the questline. Since certain areas require a certain level to unlock in the main quest line, you may need to play pvp to reach that level.
I think that you should wait to do PvP until 40 but remember PvE is also a HUGE part of this gaming so only doing PvP for the most part is a bad idea, do PvE till 40 or so then work into PvP, it is your choice but i did have a few high levels and i didn't start PvP untill 50.
1. Start PvP around 40-60 (So all of your pretty good skills are released)
2. You can start at 20-30 but i'll warn you there will be issues with skills and you will be at a disadvantage
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1. Start PvP around 40-60 (So all of your pretty good skills are released)
2. You can start at 20-30 but i'll warn you there will be issues with skills and you will be at a disadvantage