Noob Questions

[Pink&BlackAttack]

Hello all, obviously by my title and posts, you can tell, I am a noob to Fiesta : D
I started earlier today and I've been really liking it so far, somethings I wanted to know about PvP and deaths though.

So for PvP, when is a good time to start? Right now I'm not sure which class to go with, I've managed a Mage up to 14, Cleric to 10, and since it's astonishingly easy for the first few levels, I'm thinking of starting an Archer. So far I've been enjoying the mage most, but are they any good with PvP?
I'm assuming archers would be the "rogue" class and great at 1v1 but not so well in large-scale (usually large-scale is the mages playing field for PvP) or am I completely backwards?

And what is the penalty for deaths (PvP and PvE)? Obviously you lose XP, but does this apply to PvP too? And what are the other loses upon death (if any.) Another thing, is it possible to "de-level" in this game?
I've played a couple where if you lost say 3%xp for a death, and you had less than 3% on your EXP bar, you'd revert back to your previous level, with usually 1% on your bar so you had to fully regain the level.

Thanks for your time, and any extra tips you'd like to throw in such as beginners guides would be appreciated.