How long is the hiring and training process?

I'm sure this question has been asked dozens of times but I really only found one post from 5 years ago.

I put in my application last week and heard back literally the next day in which they scheduled my Criticall test for September 4th, from what I can gather thats kind of fast, I'm just curious how long it'd be for me to get trained on everything, and if anyone has any general advice for the job, I'm from San Antonio and this is a county listing rather than a general region if that helps too, also listing states "Public Safety Dispatcher" but the posting mentions EMS police and fire so I am presuming that covers it all.