Welcome Leigh.
You're asking what is pretty common with new members wishing to find out more. If you browse this forum you'll locate plenty of info regarding tornadoes and in the chase reports in the gallery area. Jimmy's storm observation section on the forum is vital reading as a heads up to what to look for when observing clouds - that's the key - observing what to look for.
There's some basics you need to get done first.
(1) A
storm glossary of weather terminology is essential. You can find these online at
http://www.srh.noaa.gov/oun/severewx/glossary.phpIt is very informative and sends you to links to highlight certain aspects of thunderstorms.
(2) Take your time to understand
how thunderstorms form and what they
need to do so. This forum supplies many threads and links for you to go to. to find out all this.
(3) As far as models such as GFS, NAPS, WRF etc - these will take a bit of time to know what to look for with fronts, troughs, boundaries, jetstreams, lows, winds, temps etc, etc - it's involved and whilst you can view them over and over, if you don't understand the basics of how weather patterns interact then it's like missing a part of a jigsaw. I could supply all the links you need but you won't understand it !
(4) As far as books - my pick is
Howard Bluestein's Tornado Alley, Monster storms of the Great Plains' is a wonderful starting point with photos and explanations. You can get it through Amazon.com Sign up to the BoM (Bureau of Meteorology in Oz) and sign up free as a storm spotter, they'll send you a book and chase handbook and lots of interesting info.
(5) When you say that you want to know when storms will be - well that's up to the bureau and you to work out! It's called nowcasting - that's what chasers do when they want to plan a chase in advance or on the fly. Forecasting is long term - say weekly, nowcasting is almost real time or daily/hourly.
So you're wrong with your thoughts that there's no help, there's heaps. you just have to take your time - one step at a time. it's a very complicated field to get your head around first up!