Learning to Code
What is the best way to learn coding for the onion omega device?
it is nothing more than a generic linux computer so anywhere you can learn to program in whatever popular language, C, C++, Python, etc.
Fundamental to using any other language will be some level of proficiency in the shell. The default shell is 'ash'.
In my units I've installed and converted the default shell to 'bash'. There is a plethora of free and some good on-line resources about bash and a handful of very good books.
@Lucia-Touma i suggest python of some kind.