Running Docker and VirtualBox on the same machine

Hi guys,
I wrote here:

but I have not received an answer.
I use Virtualbox 6 with different OS installed. I have to use VirtualBox and I also want to keep it updated. I do not use Hyper V.
May I know what to do?
I tried to make several attempts but all without success.
Do I have to install Docker for Windows Installer.exe? Before or after?
Do I have to install DockerToolbox.exe? Before or after?
Do I have to install the version of Virtualbox present in your executable or can I use the latest version downloadable from the official site?
Do I have to keep disabled or enabled Hyper V on Windows 10?
Why does nobody answer me?
Do I have to install Docker on a virtual version of Ubuntu?

Hello