So lets get started,
Select create a new domain in a new forest option
Enter your domain FQDN name,
Select The Appropriate level
Currently there is no DNS server installed you will be prompted to install DNS server here
Click Yes to continoue
On the directory services restore mode Administrator password – Assign a new password and you might need this password when you start your you domain controller in Directory Services Restore mode
After the Installation click on finish and the server reboots.