Can I Install and Boot Hackintosh from an External SSD when it is connected and Boot windows from My internal SSD when the External Drive is not Connected?

Can I Install and Boot Hackintosh from an External SSD when it is connected and Boot windows from My internal SSD when the External Drive is not Connected?

My Specs:

Intel HD Graphics 620

Intel i3 7th Gen

8GB Ram

Edit: Using OC Guide