Question about leveling Corsair.

Hello everyone, I just returned to this game a while ago and started a new character. So far I am a 35 Warrior and I really want to play COR. My main concern is at my current level, I do not possess a lot of Gil and am wondering where is the best place to get ammunition at the lower levels. And if anyone can tell what is the best way to level COR overall. Thank you to everyone in advance.