I personally use Zathura, it’s minimalistic and uses VIM bindings.
But if you want something feature-dense, with a way of organising your library, eReader integration, file converting and more, Calibre is pretty amazing (and the actual reader part of Calibre is quite nice to use in my opinion).
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Did you add the pdf to your Calibre library and open it or did you open it from somewhere else?
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Maybe try opening Calibre proper and adding the pdf to your library first? It should work the way you’re doing it, not sure why it’s hanging like that - unless there’s a problem with your Library location?
I use Okular from the KDE suite and it can literally view everything you can think of
There is also okular-mobile that is optimized for touchscreen use, it’s a bit buggy but it works
KOReader, though most people will probably find the UI off-putting at first.
Thing is, it’s perfect for use on an e-ink device, which is what’s it’s primarily designed for. The desktop (Linux and Mac) and Android versions are just icing on the cake, and they all work the same and can sync reading activity between them. Tons of features, options for tweaking book layouts, plugins for integration with other services, some integration with Calibre, etc. It takes the “kitchen sink” approach and I love it. I’ve found spending the time to learn it to be really rewarding.
Personally I use SumatraPDF.
Can read both PDFs, ePubs and even the djvu format. And its really lightweight, unlike the bloated monster that is Adobe Reader.
Same - for Windows it’s by far and away the best PDF reader for me. It’s shocking how far down the bloat rabbit hole Adobe Reader has gone!
For Android, the ReadEra app, because it’s the only darn ebook app I could find that allows a scrolling mode instead of page flip. And you can add the Twilight app also to change screen temp, and extra dim mode in the dark. It works really well.
For e-ink ereaders, I don’t know what the best one is right now. Definitely not Kindle though. And Kobo has overdrive library integration. But e-ink in general is very nice for reading. Definitely go for 8 inches or more in screen size though if you want to read manga. Also physical page turn buttons are really nice.
I used to use Foxit on Windows. I’m on Linux now, and I cannot recommend Okular enough.
I hate to say it because I am a Cinnamon/Gnome/GTK guy, but I think Okular may be the best Linux reader. I think it can do form filling too.
For normal use I use Firefox, but if I needed something different Okular is one place I would look pretty quickly. I have used it in the past for more tricky things. Well I’d probably look evince and be disappointed first, then move on to Okular.
KOreader http://koreader.rocks/