This is kind of new territory for Nolan as this is a biopic and not his usual work but I think it makes it that much better. His use of sound, and lack of, in this movie is phenomenal and really gives us a sense of how Oppenheimer would have felt or experienced in the moment.
Those people who think the movie jumps around a lot need to keep in mind all of these events happened in the past so the movie is one giant flashback but within that are more flashbacks and some contain other perspectives from people who were also there. This movie isn't designed to be a think tank or psychological thriller, these are a show of events that already happened from the perspective of JRO.
It was designed to show us how HE felt, how HE processed what was happening, how HE saw/thought/considered the world and its circumstances. Yes you're still obviously going to have your own opinions of it but the main thing was conveying how Oppie saw things; what you felt was out of Nolan's hands. This isn't inception, the movie isn't up for interpretation, its a recounting of what already happened.
If you can go into this movie with a mindset of "these things factually happened, but I want to see how they're conveyed" then it'll be amazing. If you can't get your head around that then you probably should stick to made up movie stories.