Hello Admin 16,
Thank you for posting in Microsoft Community forum.
1.Install one Windows server, such as server 2019 or 2022.
2.Set up IP address and DNS for this server.
3.Install AD DS and DNS role, then promote this server to Domain Controller.
4.If it is the first Domain Controller, you should select "Add a new forest" during deployment.
Install a New Windows Server 2012 Active Directory Forest (Level 200) | Microsoft Learn
I hope the information above is helpful.
If you have any question or concern, please feel free to let us know.
Best Regards,
Daisy Zhou