Hello @bartenderonduty,
Question 1
You can set the condition by setting the condition like this. Please have a look at the given screenshot below.

Question 2
Regretfully there is no option to filter the posts from the frontend, it would require custom development, I would suggest you please contact a developer who can assist you with your concerns or you can subscribe to One where customization questions are answered. Please note we don’t provide custom development. It is out of the support scope. Or you can use our bundled plugin called Essential grid.
Question 3
To link the cell you need to set the default HTML tag as the anchor. Please have a look at the given screenshoot.

When you set the default HTML tag as the anchor it would give an option to add a link.

Hope it helps
Thanks