https://www.thegamer.com/dungeons-dragons-dnd-healer-builds-playstyles/
Playing a healer in DnD is a different playstyle to most other games - here are some tips on making it work for your table.
Pretty good basic intro to dnd healing, but they are sleeping on Bards as healers. They can apply expertise to perception, which more than makes up for wisdom not being their primary stat. They have access to awesome crowd control and support spells in their list. And then you've got the glamour bard's mantle of inspiration that pours temporary hit points and reaction disengage/movement on several people. A party having a large movement advantage compared to the enemies is one of the best ways to reduce incoming damage.