She could try a Melee Ranger. If worried about low AC, she could get Medium Armor Master FEAT if you allow. If she's worried about the low AC at the start she could go Variant Human. An interesting idea would be to go Beast Master so that she'd have someone to help her with tanking and damage, however this idea works best with the Unearthed Arcana Ranger Revised.
If she wants more spell slots though she can go a Bard however she becomes better at melee when she's at level 3 and chooses Valor Bard. She'll be able to do what a normal Bard does but has better armor proficiency, add inspiration to (attack, damage rolls, and AC). At lv 6 of Valor you get a second attack and at lv 14 you can make an attack as a bonus action after casting a spell. Also with Magical Secrets, she can steal the cleric spells or some aura paladin spells.
Another Option she has is Cleric. If she wants to focus more on healing then she can choose Life Domain since a simple Healing Word will do 4+Wisdom Mod and thats if you roll a 1. Just cause, the math is 1d4+WisMod+2+Spell Level max heal is 10-11 based on her Mod. Also she will have Heavy Armor Proficiency which is nice. You also always have Cure Wounds Prepared.
Paladin is nice, but its more melee than healing. Although Paladins do get Auras to help you out. There is also Aura of Vitality which lets you heal 2d6 as a bonus action but you get that at lv 9. Another down side is that for a good amount of time your only healing spell is Cure wounds, You do however have the Lay on Hands Feature.
She has an Option of Druid, which is very versatile IMO. If she wants to focus more on healing as a druid she could go Circle of Land to get spell slots on short rest. If she wants to focus more on Melee DPS go Circle of Moon for the more HP and stronger beasts like a Dire Wolf since she's level 2. Note that you cant cast spells while in Wild Shape though.
If she wants to multiclass, I've heard that a good combo is Life Cleric / Druid. So the Spell Goodberry heals 4 per berry, you get 10 berries.
Something I personally want to see be done is a Trickery Cleric. With the Channel Divinity you make an illusionary clone which you can cast spells from like Cure Wounds. So either keep it near you for advantage on hits or keep it in the back to cast Cure wounds while you're in Melee.