Sharepoint as a document / case management system help

You can use it as the back end system but where you want to focus on creating is a Power App utilizing SharePoint Lists / libraries as your data sources. I learned much of what I learned from Shane Young’s YouTube channel. I’ve created full invoice processing app for AP and some other apps using that setup. Currently working on a ticketing system for our control room. Much help on the powerapps community for any issues you have as well.