I’ve spent a lot of time in Azure Logic Apps over the past few months.
Give me a reason and I’ll put together a vlog on getting started with Azure Sentinel and Logic Apps.
In the meantime here are some good references:
https://docs.microsoft.com/en-us/azure/logic-apps/quickstart-create-first-logic-app-workflow
https://docs.microsoft.com/en-us/azure/logic-apps/
Azure Sentinel webinar: Unleash the automation Jedi tricks & build Logic Apps Playbooks like a Boss

https://docs.microsoft.com/en-us/azure/logic-apps/logic-apps-examples-and-scenarios
Functions Reference Guide
https://docs.microsoft.com/en-us/azure/logic-apps/workflow-definition-language-functions-reference