There were a great many things that were strange to deal with when I first got here. Baby Jaina was adult Jaina and more mature than you were, Our son showe Han and Leia were both here, but younger, your mother and your father were here and your father and I sat down at a table where we both had the same lightsaber -- thankfully the world did not implode.
It doesn't actually get less strange. For a while I thought this world was less violent and more stable than our own, but that's not really the case.
It was after the Clone Wars when he came from, but he wasn't old by any means. Probably around the same age we are now - maybe? I never actually asked.