Use the Web Console within the Control Panel to login to your Mac Bare Metal device.
On your Mac, choose Apple menu > System Preferences, then click Sharing.
Select "Remote Management" and click on "Computer Settings.
If not activated, activate VNC viewers may control screen with password and create a secure password (8 characters max.).
Confirm changes with OK
You should now be able to connect with a VNC-Client using the password set in step 4.