Non-UEFI Windows Drive how to convert to UEFI for Clover without data loss, also how to hide a drive from MacOS but not Clover

I finally installed MacOS Mojave onto my 2cd internal drive.

My bios is set to CMS auto at the moment because Windows needs it to boot.

I want to make it so I can boot into Clover than select my drive to boot (Windows or MacOS) so I need to convert my Windows install from the old MBR or whatever it is to UEFI. I have access to Linux, Windows, And MacOS.

I DO NOT WANT TO LOSE DATA ON MY WINDOWS DRIVE.

Also how do I hide a drive from MacOS but not Clover and how do I hide a drive from Clover but not MacOS