Hello Alphabet38,
We would like to see how we can help you with using your external monitors with your Mac. You can set them up as an extended dektop by following the steps in this link: Use one or more external displays with your Mac - Apple Support
"Set up the displays as an extended desktop
You can arrange your displays in any configuration to create an extended desktop. For example, you can set your external display side by side with your Mac to create one large continuous desktop.
Note: You must be connected to a display to see these options.
- On your Mac, choose Apple menu
> System Settings, then click Displays
in the sidebar. (You may need to scroll down.) - Click the name of your display on the right, click the “Use as” pop-up menu, then choose “Extended display” or Stop Mirroring."
Cheers!