You can use a special vacuum lcd table removal to remove the glass from the fused lcd of the air 2. The work is considerably quite difficult and long but you will save quite a bit of money. You will also need uv glue and a cureing light! eBay also has the full assembly for a few hundred dollars but make sure you swap the home button over or you will lose Touch ID
However, if you don't feel comfortable, I'd just let Apple repair it but it will definitely be over a couple hundred dollars .
If you need help, you can email me at ghostnetworksolutions@gmail.com