How to qualitatively study notifications in Android?

Question

Java

I am making a to-do list application, and at the moment I need to implement the following features:
1 - setting a notification for a certain time
2 - setting a notification to be sent, for example, every 24 hours
3 - resetting (cancelling) a notification in case the user deletes the task
4 - notification update, in case the user updates the task by setting new settings
Please tell me which direction / you need to dig in order to find solutions for all four possibilities?

Answer 1

Probably you should read here:
https://developer.android.com/guide/topics/ui/noti...
https://developer.android.com/training/notify-user...
the first link is in Russian, the second in English

Answer 2

I have a bicycle. How to properly study the pedal?