PvE Monks are integral characaters. You'll always have a party waiting for you
Anyhow, here's my tips:
1 - Take cheap spammable 5 energy heals. Pump heal/divine favor. The big big spells are not actually worth while. Spot heals are what keeps your party alive.
2 - If you need a major heal, use something that works well (heal area for example, can be a great way to recover even if you heal an opponent, who cares so long as the entire party just survived something).
3 - Don't over heal. Don't just spam your heals on someone who's scratched. In other words, if your warrior has a tiny dent, don't heal him. Heal only when you know you're not going to overheal him.
4 - For your secondary, who cares! Whatever you think you want to learn skills for. A solid hearler doesn't need anything but recovery and heals and res. So your secondary skills are prtty much... well, not important. The only thing I can imagine you may need eventually, is some kind of interrupt for various fights, but even then, it's not neccessary outside of PvP.
A small example of skills:
1 - Orison of Healing
2 - Kiss of Dwanya (heals for a load when your party is hexed)
3 - Healing Breeze
4 - Healing Touch (this is your panic button for self heals)
5 - Signet of Devotion (free heal, helps to manage energy)
6 - Peace & Harmony (this comes later, but it really helps spam)
7 - Purge Conditions (great way to clean up)
8 - Rebirth (you shouldn't be resing until after battle anyways)
Cheers!