Any tips for healing?

By tips I mostly mean keybinds, UI etc to change to make it easier. Any mechanics I might not be aware of that are exclusive to healer and whatnot. Finally giving a go at it and the only game I’ve healed on is FFXIV on PS5(I mained Astrologian)and I was a damn good healer in that game, but I’ve never healed on M&K before since switching to PC and WoW. Do I need to change anything? Do I just click peoples party portrait to heal? Help 😭 I’ve always loved healing but it seems so stressful in this game I haven’t dabbled in it until now