Quote - No no, and thank you.  I have had my 3 questions all answered.

The key is adding a boolean modifier on both objects, and doing intersections

and things via that.

 

I do note that there are a whole bunch of modifier options.  For example,

When I leave an object's edit mode, and click build, it just sends the object away.

What does the build modifier do?

Build allows you to animate an object being 'built,' or generated over time. The reason it is no longer visible when added to the modifiers stack is due to the playhead being at the beginning of the action.

It is better to do one thing well, than to do many things and excel at nothing.