Now that you've successfully set up your system for Android automation and run a simple test, you'll want to continue exploring this documentation. In particular, these are good guides and reference materials especially for beginners:
You'll also find that the Appium Inspector is an indispensable tool for use in Appium test-writing, as it enables visual inspection of apps and helps you to discover element locators for use in your test scripts.
You might also take advantage of one of the many online Appium courses available to you.
Good luck and have fun!