I think it takes a special person to train dogs/read dogs (certainly not saying you are not one of them!
I would find a trainer you can mentor under, one who's training ideas mesh with yours.
I know there are some places you can get certified, tho I don't have any links.
Depending on the training you want to do, I'd get out there with your dog and start titling.
For instance, I won't go to trainer for agility unless they've been there done that
I taught agility for a few years, but decided I needed to concentrate on my own dogs so gave it up..It was VERY rewarding tho, to get those 'newbies', and see them go out there and title their own dogs
So my suggestion, find a mentor, don't just talk the talk, walk the walk