App development, Android Studio


I’m new to the coding world (Electrical Engineer-Hardware).  Seeking assistance on developing an app - IOS/Android to provide discounts to Military/First Responders/Local Heros, etc (22 year Navy pilot-retired).  I’ve found some great coding examples, but trying how to integrate into Android Studio.  Any advice would be greatly appreciatied.

How fast do you need to develop this application? And what is its complexity?