Bingowings said:
^Which is a bit a flaw in the series as it stands.
That reduces Ben and Yoda to a couple of blokes one of which introduced Luke to the concept of fishing and gave him his first rod and another guy who taught him not to shoot at the fish when they wouldn't hop onto his hook.
Not exactly a teaching experience.
They could have just sent him a few instructional video cassettes and stayed safe and alive in their hiding places.
On the other hand, listening to some EU, some assumption, Luke had ongoing guidance from Ben's spirit and from research and practice. Since he is so powerful, it seems a lot might be intuitive for him as well, with the self-discipline and practice that he could provide for himself.