Shelter is indeed fantastic, but you technically don’t need it if your main purpose is to isolate your work-related apps and snooze them for the weekend. You should be able to just use your phone’s existing Work profile without using Shelter.
The main value add of Shelter is that on top of isolating your apps to a separate sandbox, it allows you to freeze apps you don’t want running in the background and harvesting your data.
I love Okular on my Linux (EndeavourOS with KDE Plasma 6). Wasn’t aware Okular was available on PC. Thanks for the info.