You can play around with your PVP actions in the Wolfs Den Pier area (and maybe duel a friend) which should help! Some of them are extremely useful and can make a big difference once you get the hang of everything. As for learning your way around, a lot of it is just getting used to the map and the timing patterns for the ice, plus some of the more popular strategies. Your main priority as PLD is to avoid losing track of where your army is and getting marooned in the middle of the enemy. Interrupting enemy healers (and caster limit breaks) is also very helpful.

Glad to hear a positive story about FL. I love it, just wish it would pop more at the time of day I play.