Luke's training literally consisted of him spending a few hours knocking back lasers from a floating ball. Nevermind that when he made that impossible shot, he had NEVER flown an X-Wing in his life. He had never flown any space-worthy craft for that matter. He had never been in a dogfight before. He was literally just a farm boy he bullseyed womprats in a T-16 (whatever that was supposed to be at the time). That's it.
Rey spent her entire life around space ships, in a dangerous desert, beating the crap out of people with her stick. She was clearly already accessing her force powers pretty early in the morning, and as Anakin showed in the prequels, you don't even need ANY training to utilize some basic aspects of the force. The kid was flying around in podracers (something no human was supposed to be able to do) before he ever even met Qui-gon Jinn.
Neither Luke or Anakin needed much training to access their force powers. Rey, at the very least, has lived a life where she had to fight for a living. You do need training to access the full depths of your force powers, naturally. Rey clearly hasn't gotten there yet. She only beat Kylo Ren because the dude was already wounded from a blaster shot that would take out most other people. If he wasn't wounded, you can bet it would have gone the other way. As he was, even an ex-Storm Trooper who WASN'T force sensitive was able to hold his own against him for a little while.







