Hey aligotor,
First of all, welcome to the Family and all the best from here and on bud!
I am new to the environment too, but going through the topics and the comments regarding the Dispatch Training, you would see that most of the experienced guys recommend Sheffield school. Their training may seem to you as not good or comprehensive enough because of its duration, however it is one of the best if not the best in the field. It is very intensive training, not just 9 to 5 classroom studies, from what I got from the other comments. In addition, if you'd like to end up with an FAA Dispatcher License, this is the best option for a Dispatcher Training Course. It would give you the best foundation to start building your career on.
I would suggest go through all the topics where Dispatch Training is discussed here and have a look at what the experienced guys here had to say. I am pretty sure you would find it quite educating and would shed more light on which way to go.
As I said, I am not experienced Flight Dispatcher, but what I have learnt from the comments here is of a big value and hopefully it would help you.
All the best,
Peter777X.