Ryder, upon realizing that Jaal doesn't get Milky Way slang, decides that this simply won't do. So the resourceful Pathfinder decides that the best kind of education is fun education! Classic movie night aboard the Tempest becomes a thing, with Jaal bemusedly wondering why witty repartee is necessary in swordfights.
Food is a perpetual issue, since the crew come from two different galaxies. One evening, Ryder tries cooking with ingredients from the angaran homeworld out of curiosity. Jaal appreciates the effort; everyone else bans Ryder from the kitchen in perpetuity. But every now and then, if Jaal seems wistful or homesick, the two of them cook together, just for him.
Jaal enjoys reading, and S.A.M. gives him access to a vast digital library. He takes notes, and sometimes asks Ryder to explain references or idioms that he doesn't understand.
Jaal can be a restless sleeper. Ryder always covers him back up after he kicks off the sheets.