I'm here to take care of your questions today, @CT58.
Yes, we're able to run basic customer and vendor reports in QuickBooks Online (QBO) Simple Start. All you need to do is look for the report/s you want to open from the Reports tab at the left pane. On the other hand, you can visit these links to learn more about what you can and can't perform with this plan.
Also, here's an article that contains the details of what specific reports you can open with your current subscription.
We might not have tutorials specific for QBO simple start, however, you can check the features available in this plan and use these tutorials/help articles as your guides while working with QuickBooks:
Our doors are always open here on the Community page if you have any other questions. Feel free to add a comment below. Wishing you a good one!