Hi @RogueArtist , thank you for posting in the Q&A forum.
Here are a few things you can do to get start with SharePoint:
- You can refer to the document to find out which version of SharePoint you are using. Management process will be quite different in SharePoint Server and SharePoint Online.
- If you want to start the SharePoint site over with new lists and entries, you can create a brand-new site for the 2021 ticketing system.
Here are the references for SharePoint Online: Create a site in SharePoint. / SharePoint Server: Create a site collection in SharePoint Server. - To get further information on how to work with SharePoint, I recommend you follow the training courses provided by Microsoft or other institutions you can reach.
Here is a Quick Start document you can refer to for SharePoint in Microsoft 365 (SharePoint Online): SharePoint video training.
And other suggestions from third-party blog: 5 ways to learn SharePoint.
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