Achieving Data Synchronization in Android App with Kotlin - Best Approach and Option?

Question

I am currently developing an Android application using Kotlin and need to implement data synchronization between my app and a server. I want to achieve the following functionalities:

Backup Data: Transfer data from my app to the server for backup purposes when the device is connected to the internet.

Offline Access: Ensure that users can access data from the server even when the device is offline.

Manual Sync: Allow users to trigger the synchronization process manually.

Scheduled Sync: Implement a scheduled synchronization, for example, syncing data at a specific time of the day.

I'm aware of the "Sync Adapter" concept in Android. But it is most complex for me as I am beginner and I'm not sure if it's the most up-to-date and best solution for my requirements. I need guidance on the best approach and possibly recommendations for libraries or frameworks that can help me achieve these functionalities efficiently.

I'm open to exploring other options if they offer a more modern and efficient solution.

Please Guide me....