I’d still use LUKS. Even on USB keys.

I still wouldn’t use Veracrypt on a Linux disk. What about LUKS instead?

If you’re only using the external disk for days you could use ntfs with bitlocker and mount that in Linux. When your rest to fully migrate you could then do something Linux only if you wanted.

I had an issue where my docker networks started overlapping my network addresses and I had some issues to connect to the machine etc. so perhaps check to make sure your docker addresses don’t overlap your home network range somehow. Also keep the subnet mask in mind as the range might be bigger than what the first few numbers indicate.