In addition to the over 500 community samples a lot of people don’t realize the product comes with a plethora (in case you ever wondered how many is a “Plethora”: in this case it is 34<g>) of amazing samples and templates.
https://powerusers.microsoft.com/t5/Community-App-Samples/bd-p/AppFeedbackGallery
To use the built-in samples and templates, log into PowerApps.com.
Then from the home screen select “All Templates”.
Note: This the same selecting “Create” on the left most navigation.
Scroll about 1/3 of the way down and you will find the built in application templates.
If you are looking for a suggestion/starting point the training template is hard to beat!
Note: this does not include the Project Oakdale templates!
Those are even easier to locate and use as they are called out in the documentation here!
https://docs.microsoft.com/en-us/powerapps/teams/use-sample-apps-from-teams-store
Remember if you have need training on Power Apps you can find that here: https://aka.ms/powerappstraining
Sterlings 