I use the app a lot to track various ongoing things I have in my life.
I share many boards I have publicly.
I assign myself to the cards I am working on now and filter to see only them by pressing Q key. I mark cards I want to work on next with
All of my boards are filtered to show only the cards I am assigned to.
You can attach link to card by simply selecting card and pressing
⌘ + V.
You can also add a link as a new card itself by simply
⌘ + Ving in the new card area. This will also fetch the thumbnail and add that to the card and create an appropriate title.
In the date picker you can just type the number of the month to pick it. Or you can do
13/3 to make a due date for this year on March 13th.