Healing 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 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.