At the risk of sounding like an echo, yes - get RANT. In particular it has excellent tutorials, some of which explain things and give you simple techniques that I have never seen in any book.
Its not a simulator, you will realise that from the downloadable demo, but it is (in my opinion) the best training aid for teaching you what the needles show, and what you should do next.
I have to say that its now got rather pricey, but I have seen them sold second hand for about half price. Versions before RANT 2000 (eg RANT 3.1) don't have such fancy instrument appearances but will still teach you all you want to know.