Making an appointment in the Android app?

Question

Android

Hello! The application will have 2 types of profiles - specialists and ordinary users. It is possible to make an appointment with specialists, that is, in the profile there will be a record line that, after clicking, opens a calendar in which working and non-working days and the time when you can make an appointment with a specialist are indicated. How is it possible to implement this function in android application. What topics should be studied for a novice programmer.

Answer 1

The question is too general. A novice programmer needs to learn the basics of programming android applications.