Making a second Windows installation on macOS Catalina

I am trying to get a second Windows installation. I want this one to be unable to access the first Windows. I have looked at some threads but I can not understand what I need to do as they are all slightly different from one another and I dont understand them. Here is my diskutil list. (Disk 2 is a USB with the ISO file and the Windows support files loaded from bootcamp. Bootcamp does not let me do a second Windows installation.)

/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                 Apple_APFS Container disk1         499.0 GB   disk0s2
   3:       Microsoft Basic Data BOOTCAMP                501.0 GB   disk0s3

/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +499.0 GB   disk1
                                 Physical Store disk0s2
   1:                APFS Volume Mac SSD - Data          214.8 GB   disk1s1
   2:                APFS Volume Preboot                 24.9 MB    disk1s2
   3:                APFS Volume Recovery                526.8 MB   disk1s3
   4:                APFS Volume VM                      3.2 GB     disk1s4
   5:                APFS Volume Mac SSD                 11.2 GB    disk1s5

/dev/disk2 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *30.9 GB    disk2
   1:               Windows_NTFS WinInstall              30.9 GB    disk2s1

Here is the fdisk output:

Disk: /dev/disk0	geometry: 121601/255/63 [1953525168 sectors]
Signature: 0xAA55
         Starting       Ending
 #: id  cyl  hd sec -  cyl  hd sec [     start -       size]
------------------------------------------------------------------------
 1: EE 1023 254  63 - 1023 254  63 [         1 -     409639] 
 2: FF 1023 254  63 - 1023 254  63 [    409640 -  974610392] Xenix BBT
*3: 0B 1023 254  63 - 1023 254  63 [ 975020032 -  978503680] Win95 FAT-32
 4: 00    0   0   0 -    0   0   0 [         0 -          0] unused

Thanks.