>>96051223
Armor of agathys is one of the better damage spells that also defends you.

If you can convince your DM to let you take pic related to replace your background feat. With that, you could go draconic sorcerer (cold) and you get a large laundry list of close range spells you can convert to cold to get that damage boost at 6th

>earth tremor
>maximilians earthg grasp
>Rime's Binding Ice