Once you have the TFT working, you can now continue onto a full test sketch, which will show how to read the light sensor, accelerometer, capacitive touch, and even the battery voltage!
In addition to the ST7735 & GFX libraries mentioned in the previous section you'll also need...
Adafruit Unified Sensor
Adafruit SPI Flash
Whew, once all are installed. You can load up the example code, since it has two files and is kinda large, we've included the zip here:
Make sure once you've loaded it in, you have both the full_test code and the additional audio.h code