How to make a minimap camera zone grow bigger and smaller with zoom

Hello, I am trying to make a minimap zoom feature for my game where the minimap shows a small trapezoid for the entire view-able area. my problem is the trapazoid is not adjusting to the zoom itself. for example: If I zoom in with my main camera, my mini map trapezoid should significantly get smaller to reflect that I can now see less on my screen. I had another issue if you care for the bonus points. How do I get a raycast or position section on a minimap to reflect a position in the real world? for example: if i click a spot on the mini map that I want my character to move to, the character will move to that spot in the real world. If i need to clarify anything, please let me know. thank you.