Here are my suggestions. While they have a loose order, you can absolutely approach them in parallel with relatively no issue. But you do need to have at least a few of the basics of core JavaScript to understand what you come across in the others.
- Read Eloquent JavaScript.
- This will give you a grounding in JavaScript.
- Try to learn what is provided via the browser and the document object model (DOM), and what is the core language. You can utilise the latter in Drafts.
- Read the Drafts scripting documentation.
- They describe things pretty well for anyone who has worked with any sort of programming language that has a modicum of object support.
- Read through some examples on the forum.
- This forum has lots of examples posted on it already. Try searching if you are looking for an example of something in particular.
- If you get stuck, post a question and ask for assistance.
- Continue to look at actions in the action directory.
- Pick them apart, change them, destroy them and bend them to your will
- Pick them apart, change them, destroy them and bend them to your will
Hope that helps.