Except that Luke didn't learn anything on his own, he has been a bit trained by Ben in the first movie. It's not like if he invented it. And no, Rey being a master in the force as soon as she landed her hands on a lightsaber is not something in line with what was done before lol.
But you are also going to tell that it's completely normal for her to know how to sail during a storm despite the fact tha she grew up in A DESERT.