Hello,
I have gone through your requirements, you want to build Quizzes app with approx 500 questions.
So, Yes I am ready to do this task. I have done this type of app before.
I will create sqlite database with two table first for category & second for quizzes. So you just have to put as many questions as you want. you can also update app with just add new database.
I am very clear about requirements, I can start work on it now & can finish it within today.
Let me tell you about myself, I am fresher on this platform but I have worked on more than 25 android applications in four and half years of my professional career.
I have expertise in android development, full knowledge of Android life cycle - Material design - REST api - Sqlite database - Payment integration - Third party library integration - Background services.
One more thing I am full time freelancer so will always available for support and communication.
Let me know if you are interested, I am ready to discuss everything before you award me this task.
Thanks,
Hardip