You will not find a torque tutorial that anyone can read and understand torque enough to make a decent addon, ever.
You cannot learn how to code in a couple of hours, a couple of days, nor a couple of weeks. It takes a lot of time.
The best ways to learn is to read through existing addons. If you think you understand how something works, change a number here or there, and see what happens.
The best tutorial you will find are resources that are in the stickied topic. The best place to search for info is here in Coding Help.
Learning like 'X does blah blah' is not effective. Find something your interested in making and read through similar add-ons.