What the treatment is, and why it is not in this course
For most anxiety disorders the treatment with the strongest evidence is exposure based. In plain words, working out with a trained person a series of small steps back towards what you have been avoiding, at a pace you agree together, so that your system gets the information it has never been allowed to collect.
We are not going to walk you through that, and you should not assemble it for yourself out of an article. Done alone it commonly goes wrong. People push far too hard, frighten themselves badly, and conclude they are beyond help. Done with somebody trained who knows your situation, it works well.
So this course gives you the map. Somebody qualified walks the road with you.