Need to Deploy Azure Sentinel

Its always good to start with the UI and quick start template covers it. At later stage if you want to go through automated deployment do take a visit this link
https://techcommunity.microsoft.com/t5/azure-sentinel/deploying-and-managing-azure-sentinel-as-code/ba-p/113192

If you are good or interested with PowerShell scripts make use of AzSentinel PowerShell module for scripting.