Heal Druid is your go to build when starting this class. It has a very small learning curve and can easily be picked up, however, do a little bit of research when you first start playing Heal Druid so you know some of the basics.
You provide a large amount of healing and, in most cases, will overheal when playing a full heal build. Once you have more experience with this class, try to hybridize a little bit by adding more Berserker pieces.
As with all the Druid builds, you provide a large amount of squad wide and party wide buffs. You provide spirits, , and a huge range of boons. Finally, to top it all off, you offer a nice amount of CC through your pets and skills.
Heal Druid is very beginner friendly however please, please, please read the written guides that explain your utility choices and pet choices. Understanding how this class works and when you need to provide certain utilities will greatly help you with mastering this build.