Yeah, a healing subjob gets used on SMN a lot. You're going to find pretty fast how much different a creature jobs and subjobs are in this game compared to XIV. Also, you'll want to start killing leeches if you plan to unlock SMN, they drop a special ruby that's needed for that quest. While leeches in most vanilla/Zilart zones can all cough it up, the odds aren't very high(maybe get a high-level THF to help, they have advanced traits+gear that increase drop rates). Also, while it's not something you have to worry about yet, look into making macros for your spells and abilities. You can change your gear on the fly even during combat, and later on you'll have multiple pieces you have your macro swap in to boost the particular thing you're doing, and swap back to your standard gear right after. Try to find yourself a LS if you haven't yet, so they can explain the mountain of things to you.