Moodle plugin creation

I am a beginner in Moodle and I wrote an algorithm in python to learn users profiles. The aim is to create a plugin that provides adaptive functionalities in the Moodle platform based on users' profiles. However Moodle documentation is too large, which makes me confused and I can't find a way to start creating the plugin. There's too much information and no good tutorials for beginners. So what I want to know is: - Are there any good tutorials that I can't find? - How should I begin? Do I absolutely use git? - How should I choose the right plugin type? Is it OK with Machine learning backend plugins, since my algorithm belongs to machine learning area? Any answer or information would be very helpful!