Luke's currently trying to get away from the press of things. There's -
The last while has been chaotic, to say the least.
He's still only kind of processing the idea that Darth Vader is his mother, and he misses Han, and he worries - of course he does - about Lando and Chewie and their mission to find their friend, and Leia's so busy trying to keep everything together, and Luke has less than no idea what he's doing -
He sometimes thinks he should go back to Dagobah. Go back to Yoda, and to his training -
But something always comes up. And... Luke doesn't feel it's time. Not yet.
So now he's leaning against a rock a bit away from the latest base, still close enough his speeder could get back quickly in an emergency, trying to do something resembling meditation.
It's... Not going well.