Which healer class is easy and more fun from 1-70 ?

[Tridus]

i just want something easy and least able to learn mechanics as i go but cheer's will try get healer gear for my new fresh lvl 1 cnj

Conjuror/White Mage is the way to go then. It's the most straightforward to pick up and heal with because there isn't extra stuff to juggle (cards), and you don't have to deal with the pet sometimes doing what you want and sometimes not. Also has enough healing tools and output to get the job done reliably.

Just don't forget to pick your role actions. There's really important stuff in there like Swiftcast, Esuna, and Lucid Dreaming.