The Obi-Wan Kenobi teaser trailer is here

[Answer]

@Brainspore

Between those two instructors Luke Skywalker had maybe a few weeks’ worth of training at most.

Instruction.

@Brainspore

Anakin trained under Obi-wan for over a decade.

Maybe Obi-wan was just a really terrible teacher.

Or perhaps Luke was a better pupil, more talented and did train more.