Carrying on learning
If you feel like you have come a long way, you are right. There is always more to learn, however.
Carrying on reading
You will find that as you make your first app, you suddenly realize that there is a gap in your knowledge that needs to be filled to make some feature come to life. This is normal and guaranteed; don't let it put you off. Think of how to describe the problem and search for the solution on Google.
You might also find that specific classes in a project will grow beyond the practical and maintainable size. This is a sign that there is a better way to structure things and there is probably a ready-made design pattern out there somewhere that will make your life easier.
To pre-empt this almost-inevitability, why not ...
Get Android Programming with Kotlin for Beginners now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.