If you are newbie healer, focus on healing. Being a good healer is your primary job. Understand how to be efficient at healing with respect to MP, global cooldown usage, and time.

Once you are efficient with healing and gain more experience, you learn where you do not have to heal. That is where more experienced healers recognize where they can add damage. Improve your foundation of healing fundamentals, and then branch off into damage afterward if you decide to.

With regards to macros, try to restrict macros just to basic stuff like Eye for Eye and maybe Benediction macro for Living Dead on Dark Knight. Macros can be unreliable so just be aware and test out the macros you decide to use. Macros are just for quality of life, so do not go too overboard on it.