Sounds like you need to set some prioritiesI'm looking forward to watching this at some point. But, to be honest I don't really remember much about the story.
I know I enjoyed the original movie and the Scifi miniseries. I own both on DVD, so debating if I should go and revisit those again 1st before watching this. Maybe they'll jog my memory on the story and I'll actually remember what the hell is going on during this movie.
And I still haven't watched Blade Runner 2049 for the same reason. Its been so long since I watched the original. I need to finally open the deuxe Bluray I bought years ago and watch it 1st so I know what the hell is going on.
Dune follows the book very closely, so a brief youtube refresher would be enough I'd say. Otherwise you know too much going in.
Here's a quick video on the cinematography of Bladerunner. If that isn't enough to make you want to watch it, I don't know what will. Music is second to none for Sci-Fi.