Try taking up chess. Instead of just being a game you can play, it has a huge amount of history and depth, so that you can actually sink your whole brain into it for as long as your mental endurance and boredom hold.
The amount of online content for it has reached gargantuan proportions in recent years, so you shouldn’t run out of material any time during this lifetime, and it’s all accessible from a hotel room with wifi.
I’d recommend Eric Rosen as an initial instructor. He’s a master, not a GM, but his approach is good for beginners, and his overall tone would be good during more stressful life circumstances.
Chess.com is a perfectly acceptable platform to play on, but you also have a mom nearby if you’d prefer some over-the-board.