if you need to read all these books for the movie to be even semi coherent... its even more of an epic fail than i realized... you mean to tell me that they had all this source material and they went with whatever the fuck rian could think of?!
Well you could plainly see that the course Admiral Holdo plotted through the ship missed Rey, Finn and Rose by a fairly large margin. As it is a Sci Fi movie about wild technology, and clear plasma shielding capable of sealing off Space Breaches are frequently seen even in the first films - and these films are set 30+ years in the future I think a lot of the misconceptions and seemingly discernable plot holes are reliant upon the audiences ability to either ignore or acknowledge that in the Star Wars universe - Sci Fiction is often Science Reality and technology is far more incomprehensible - particularly for something as miniscule as an empire ship that has been breeched during a crash/rebel onslaught - than most may realize.
Also - It doesn't take much reading to find out juuuuust how sophisticated the Empire capitol ships really are in relation to what has been visualized in the films. Read any serious Starwars novel and you are guaranteed to find out a handful of interesting fact's about Empire Ships.
The technology, technology that far exceeds what the film's visualize - is discussed in detail in the books. And across most of them.
With that said, it's Luke Skywalker you are forced to read Star Wars Novels for. For all we know, the Luke assisting Rey - at point's was not actually Luke at All. As Luke is at this point in the cannon, essentially god.
It's also worth noting he routinely buff's out other Jedi with more nuanced force power's than they might have had otherwise.
Last I read, he was helping the rebel alliance - in his spare time - with a technology that could replicate it's troops and others as easily as he is able to replicate himself - that he has studied the dark side of the force after he long ago realized that what he thought was Yoda and Kenobi.....
Was actually a technology utilized by the Dark Side to replicate Yoda and Kenobi for reconnaissance.
He finds out Yoda and Kenobi ect all essentially left him long ago - to fight a greater war occurring inside the force - a war which he has become powerful enough to involve himself in (though he has not caught up with Yoda or Kenobi to my knowledge) without succumbing to death in order to do so.
Yoda left, and did so knowing the Dark Side had caught on to the fact that they were communicating with Skywalker within the force, and in turn created a recon technology to replicate Yoda and Kenobi and friends - but Yoda, it is said - also realized Luke was far too powerful at that point for it to matter or even make a difference - and as such immediately left to fight this force war (Kenobi had left some 4 day's prior, and without contacting Yoda for years) taking place inside the force. The war itself is about/leveraged on Midichlorians - which are said to be tied to children outside of their place in the force more than previously was understood or realized.
Also, after turning to the Dark Side for his own (some may say, selfish) studies... Within 2 days of studying the Dark Side - he turns away from it.... as he only studied it to find out potential vulnerabilities to the Jedi/Rebel Forces he and others may not of known about - all he in actuality learns is the Dark Side is far weaker than ever he realized. And the implications of turning to the Dark Side for Luke had Zero Impact on Luke Skywalker.
And that's about all I know about Luke Skywalker. Almost all of it anyways.
It's likely his clone is the fabled Luke who has a wife and kids ect.
The Real Luke likely does not. The Real Luke Skywalker is said to have found a piece of technology, the force led Luke to - that has invigorated his interest in pursuing new Technologies for the Rebel Alliance.
Even if he is at this point, what many would consider "God". This technology is said to have only amplified his abilities and knowledge. It is apparently some type of all knowing omnificent AI derivative, that let's him peer into all facets of existence and tweak/interject into physical outcomes.
And then... during some great incursion (may be what is shown in the movies, we don't know) he went and defeated an entire Sith Planetary Subsystem (upwards of 9 planets teeming and filled to the brim with Sith) on his own, preemptively. While also harnessing the force to help his friends and the Rebel Forces during said war incursion.
You don't find this out because there are Luke Skywalker novels (and there are)...
You find it all out by reading Random Star Wars Cannon - and this information usually comes in the form of Luke (actually, one of his replicated variants) reporting to the Rebel Alliances - or you find out about Luke by coming across breaks in Story Arcs where Luke has intervened in some way.
There's no overwhelming piece of comprehensive material that would tell you all of this nuanced subtle information otherwise.