No problem at all mate, as for servers there really is no best or worst (other people will disagree) but its all based on what kind of people you party with. Just make sure you watch out for NA and EU servers at the end of the server name.

As for classes the dps classes all function well in their respects. the breakdown goes:

Dragoon - AOE heavy melee (skills require some minimal movement to achieve best dps, cant really say more as i dont have it leveled to 50 yet.)
Monk - Single Target Master (VERY difficult to master rotation and requires CONSTANT movement. Staying in FLANK only mode is a pure waste of potential and gives master monks a bad name :P)
Bard - Single target/AOE/Support (this class doesnt have constant dps like the others but has good burst/dot/aoe abilities. It also is a class that is needed in endgame for its MP/TP regen songs. No cast times on skills so you can fire while moving and dodging. a really easy class to pick up and play and not that difficult to master, IMO)
those 3 are melee/ranged which, i assume, you are referring to.
But if you want to stick with magic:
Black Mage - AOE heavy
Summoner - Single target DOT king.