You can install Windows Server 2019 by following the steps given below.
Step 1 : Download the Preview version of Windows Server 2019 from Windows Insider Portal
Step 2 : I have installed using the VMWare player. Once you booted the Windows_InsiderPreview_Server_vNext_en-us ISO. You will get the following screen. Click Next
Step 3 : Click on Install Now
Step 4 : Click I don’t have a product key
Step 5 : Select the version you prefer to install. Please select the Desktop interface option you need Windows GUI
Step 6 : Accept the license agreement
Step 7 : Choose the custom installation method
Step 8 : Choose the drive for installing Windows Server
Step 9 : Now you can windows installation is in progress ….
Step 10 : Now the installation finished and system will reboot. Please be noted that system will automatically rebooted multiple times during this installation.
Step 11 : Once the server rebooted you will get the prompt to setup Administrator password. Just set the password and click Finish.
Step 12 : That’s all !!!!!! Now you can login to the server and you can see the same UI as in Windows 10 OS.