Installing windows server 2019 step by step
 
Step 1: Boot the server from Windows Server 2019 media

Step 2: Click Next on the language options screen

Step 3:Click On The Install Now

Step 4: Select The Operating System To Install

Step 5:Accept The License Terms

Step 6:Select Custom:Install Windows only (advanced), if its a new installation

Step 7: Choose drive location

Step 8: Installation will start.

Step 9:System will automatically reboot after installation & prompts for administrator password set.

Step 10: Click Finish to complete the installation