Loyalty rewards can be obtained by accessing dlc either through the crown store or through eso plus. Assuming you're asking when can you start it.
Skyrim Dlc When To Start - Skyrim Dragonborn (DLC): The Cultists Who Start Main Quest - YouTube - To get the ball rolling on dawnguard, talk to common guards that roam inside or surrounding major cities, and when i start the game with steam, the skyrim screen comes up, but skyrim crashes even before i get the menu with the file load options.
