How best to watch the X-Men films (so that you understand everything). I have to watch everyone and now have disney + and netflix and prime, but would also borrow one if there's no other way…
To the best of my knowledge there are these:
X-Men
X-Men 2
X-Men: The Last Stand
X-Men Origins: Wolverine
X-Men: First decision
Wolverine: The way of the warrior
X-Men: future is past
Deadpool
X-Men: Apocalypse
Logan - The Wolverine
Deadpool 2
X-Men: Dark Phoenix
The New Mutants
It's best to just look at them in the order of their release.
As already said in the release sequence makes a lot more sense than chronologically.