"Master Yoda did. Ben, Obi-Wan Kenobi, I knew him as Ben, he never had a chance to really train me. He taught me a few basics, but we only had a few days together before he died. Then I was more or less self teaching for a few years until I pointed towards Master Yoda."

And he learned a lot about 'How not to die when Vader comes for you'.

Luke's keeping an eye on their surrounds. And by eye, the Force, the Force will tell him if someone needs his help. "Did you grow up in the Temple?"