Active Directory documentation and best practices

Dear all, 

please, I have to fix a critical situation. 

I have recovered a DC VM on an old Hyper-V host. This DC is corrupted and seems that it is not working as well.

I installed 2 new phisical host (cluster) with Windows Server Datacenter 2025, configured Hyper-V role, networks etc..

Also prepared (out of cluster) 2 new VM Win 2025 and I would like to prepare as new DC01 + DC02.

I guess is better to configure the DC on the hosts to grant that the DC role is always available also if the cluster is not running (feel free to correct if I'm wrong, I will appreciate).

I need link to video or documents to correctly perform the configuration of the new DC.

The old DC are running a Windows Server 2012 R2 standard version.

Is it possible to migrate to Windows 2025 datacenter ?

Take note that at the end I have to assign to the new DC, the same IP address.

thank you very much for your support.

BR

Alex.