Today, I hit a personal milestone. Kacho got his white mage robes! I'm so happy!

I plan on continuing with the main story quests but how do I go about gearing up intelligently so my lalafell healer is ready for the healing challenges ahead?

I look at the Mor Dhona vendors and they all require currency that I am not sure how to earn. Gil I understand but poetics and tomestones confuse me. So what do I do from here?