level as enhancement. Unfortunately doing many instances while levelling is not feasible on most servers. You are still low level, so maybe you can find groups for WC (or stocks for ally), but after that instances are hard to come by. If you are persistent you may find a SM group.
Anyways stay as enhancement. You will be able to heal just find as enhance. After 60 it may become a little difficult, but with a good group you can do it. Around 71 or 72 you can switch to resto if you want to do more healing.
The biggest thing you need is not resto spec, but healing gear. At that low a level, gear with spellpower is almost impossible to come by (you might find a cloth piece or two). Mainly go with gear with int on it. Later on you'll want to concentrate on spellpower and mana per 5 seconds (mp5), and later on still accumulate some haste gear. Later you'll find mail to suit your needs. Early on you may have to go with some cloth, but try to use mail (as we don't have fade abilities priests have, you want to be able to take a hit or two). but ideally you should not being hit while healing. Not many healing maces that level, so you will have to use a staff.
But when you are solo and doing quests, use your strength, agility, and stamina gear. Just use the int gear for healing instance. Just keep the spare gear in your bags or the bank.
Edited, Mar 29th 2009 2:33pm by thrashering