SharePoint at AIR is a completely different structure.  Take some time to get familiar with it by browsing the folder structure.

Given SharePoint is mainly considered a backend system, there should be nothing for you to do regarding migration.  If you are looking for something, take a look at the SharePoint Migration Mapping (AIR credentials required) to understand where the old SharePoint site data was moved.  

Existing permissions were copied so you will only have access if you previously did.