PowerApps Template for Database Searching of a SP Document Library

In getting familiar with PowerApps, I haven't yet found a template that serves my need.  The datasource is a SP document library with folders and files as assets.  What I need PowerApps to do is all or at least one of the following:

1. pure search yielding all results
2. filtering + search yielding more accurate results
3. all filtering yielding precise results

The app will be non-mobile and there is no need to add assets from the app.  Can anyone point me in the right direction template-wise?  Thank you.