You have to pick a healing soul if you want to heal. If you look at the official rift site's class listing you'll notice shaman is surrounded in yellow. I heard that meant it is a heroic class and not one you can actually start with when the game launches.
I certainly hope this is not the case, granted, I can probably wait till I can get the quest in the early teens if that's the way it will be, however being limited to one of 3 classes upon creation will suck. I'd be surprised if that's the way they went, it wouldn't make much sense imo.