Are we able to do this ourselves or does it need to be taken somewhere? Don't they sell charge kits for newer cars at like autozone/walmart?

You can buy conversion kits and charge kits but I believe it depends on what state you live in. Example I can buy this stuff in MN, but am pretty sure it'* not available in WI anymore.

You can do it yourself if you have the right tools, but making a mistake releases the refrigerant into the atmosphere so if you don't have the tools/ don't know how to do it correctly, you'd probably be better off taking it in and having it done at a licensed recovery shop.

My opinion anyway...good luck.

You have to ask yourself, why does it need a recharge? Diagnosing A/C system faults should be done by professional service techsnicians, it is a specialized field so to speak. Your car utilizes R134a as refrigerant. The A/C system should be evacuated & leak checked while under vacum (drop test), and other components checked, then re-filled with the correct amount of refrigerant by weight. Unless you are absolutely sure that the charge only needs topping off, I would go to a professional. Just my .02. good luck with it.