Why you are insisting that learning the force must be difficult is beyond me. That isn’t what we see with Luke. Why should we with Rey? For both characters, there are plenty of obstacles and successes and focusing on Luke’s obstacles while focusing on Rey’s successes is most definitely apples and oranges. Compare their successes (their goals and what they actually achieve) and their failures and both follow the same pattern - some wins, some losses, but generally more wins.

Because Lucas has made this very clear in his statements about how the Force works, which I’m not going to repeat. You have to study, to master it. It’s as simple as that. The entire premise of TESB is, that the Force doesn’t come easy for Luke, and he fails on numerous occasions, and where he succeeds, he rarely succeeds on a first try, and with great effort. Luke leaves Yoda with the clear message, that while he knows the Force, he cannot control it, and facing Vader in this condition is a danger to him physically, and spiritually. He subsequently gets his *** handed to him in his confrontation with Vader, and he ends up hanging on for his life battered hoping that his friends will save him. You don’t have to look hard to see, that Rey’s character gets a very different treatment in the ST. The OT and PT make it very clear, that learning the Force, and becoming a Jedi is very difficult, and just using it half cocked has terrible consequences. For Rey it comes easy, and without consequence. She’s unscathed and in a jolly mood by the end of TLJ, ends up saving the remaining rebels, and is never seriously tempted to use the dark side. That simply doesn’t rhyme with the themes Lucas established in my view. The fact is, that even TLJ acknowledges that Rey is different with the whole darkness rises and light to meet it explanation. She just recieved her powers from the Force free of charge to counter the rising darkness. It’s just very poorly developed, and a rather flimsy concept for throwing Lucas’ themes by the wayside.