I know you said priest but as a resto druid who loves healing, I’m also leveling a priest for the first time. The biggest thing that helps is some kind of mouse over macros or an addon. I use Vuhdo. This makes it so you can mouse click a heal directly on the raid or party frame. It’s so much easier to heal this way rather than clicking a person, then clicking a spell or pressing the keybind.
If you drop a void plague and then wand you’re doing more than enough. But the big thing is that on longer fights you don’t eat your mp5 by casting stuff that you don’t need to cast. If it’s a short enough fight and you don’t need to conserve your mana to heal, you could penance the boss or whatever or smite, but really wanding is more than enough imo
Healing here is so basic addons aren’t really needed. You’ve 2 maybe 3 heals.
Balance heals with mana cost and need.
Except warriors. Rage starved warriors are upset warriors.
If dungeon/raid wanding. Conserve mana for those oppsie situations. If pvp (and you’re the one fighting) it’s attrition. You’ll wear them down with dots, keeping yourself topped up with heals.
priests actually have one of the more interesting toolkits via runes with the potential for very cool hybrid builds. power infusion spec should be very interesting next phase im excited about it
Also make sure you have an addon that shows incoming heals on the raid frames. HealBars classic works on Blizzard default frames. That way you won’t overheal as much. You also know how low the tank must be before you need to throw a heal.
As a priest it’s really important to take advantage of 5 second rule to get mana from spirit. So for example you start the fight with renew, PoM, PW:S as needed and then you chill and wand if you want while regenerating mana, until the tank has lost enough health to be worth being topped up with a heal. And right after your big heal you throw more shields/renews/whatever. You save mana by casting in bursts and regenerating in between, really makes dungeons faster by reducing drinking time, more than trying to DPS yourself.
I strongly recommend mouse over macros for all your heal and buff spells. Stick to penance and PoM most of the time. In AoE heavy fights you can swap your glove rune to Circle of Healing. You can drop PoM for Homunculi if you want to go more of a debuff/damage route if the incoming damage is low and party physical dps is decent.