I had the chance to attend the Seattle PowerAppers meet up on Saturday and what a gift. The subject of the meeting was backing up your Power Apps into GitHub. Definitely very geeky and the session was intermediate to advanced, but because it was presented so well I was able to keep up and learn. I learned more about Github and the source code repository and about the difficulty of pulling/extracting the source code from a Power App.
Samples were not only shared, but we walked through updating, using and adding to our own Power Platform library.
If you want to get access to all the goodies you can find them in GitHub https://github.com/SeaDude/seattlePowerAppers
For those of you in the Seattle area that are NEW to Power Apps, the group also has a session each month on GETTING STARTED WITH POWER APPS, the BASICS. Signup for the Meeting Up Group here https://www.meetup.com/Seattle-PowerAppers/members/115970512/