Hi,
Following is the tutorial which explaines following things,
1. Schematic Explained
2. Bootloader
3. How to use Web Editor
4. How to Use Arduino IDE
5. Example on LED Blink
6. Example on Serial Interface
7. Example on Switch interface using polling method
8. Example on Switch interface using interrupt method
9. Example on ADC
Here is the tutorial
https://youtu.be/k1g4uVNTA8o