How to quickly enter corporate development?

Question

Android

Hello. Interested in the question of how to quickly enter the corporate development in the field of mobile applications? I have knowledge of Kotlin, Java Core, SQL. Interested primarily in Android development. There is a huge list of everything that can be learned, but I would like to limit the list of technologies for now to those that are necessary for a quick start in enterprise development. In this regard, I have questions:
1. What frameworks, technologies, development tools would you advise to study first of all?
2. What kind of applications are most often developed in the mobile field?
3. What kind of application do you need to develop to know exactly what is ready for real work?
4. What services and tools, besides the SDK, do you recommend using when developing?
5. How long would it take you to study the above?
Thank you.

Answer 1

1. Everyone, everyone, as soon as you hear an unfamiliar name - immediately teach.
   
2. Most often unpromising applications are developed. Such a selyavi.
   
3. todo list.
   
4. Toaster, habr, SO - yes, a lot of them. Git more.
   
5. Oh, I don't know.