You know...I bet Luke is going to feel like shyt for going into hiding when he finds out that in his absence: Han and Leia broke up, The First Order rose up on the scene, Max Von Sydow's character (whom had a connection to him) was slaughtered by Kylo Ren and the innocent villagers were all slaughtered by Stormtroopers as well just because they were there, 3 or 4 planets were destroyed by the Starkiller Base, Han was killed by Kylo Ren and now Leia (who has already been through a lot of shyt in life) is in mourning, Finn was gravely injured by Kylo Ren too, and dozens of X- Wing pilots all died in the ensuing battle to destroy the base.
It's probably just best to leave all of this out when getting him up to speed on things since he went on his island vacation. He doesn't need more guilt on his shoulders.