Course Personal Trainer

I wonder which of course I do because I am trying to determine if this is what I do (but only'll probably actually be fit:) I need). Who knows how many years of education, as required, oh, and above all, earn as much as you can;) lol, the chemistry is one thing. I have a friend who is a personal trainer. She did not attend college, but took some classes from the work they already offered. I would be a gym and ask. Possible classes are at the center or a community center for all classes to go to.