There are many people who will take your money and claim to teach you how to shoot to defend yourself and others. Some are quality establishments of learning, run by people who understand not only the nuts and bolts of shooting, but can efficiently pass it on to others.
This is not one of these places:
When selecting a trainer, be sure to seek out positive and negative reviews from previous students, view pictures and videos of courses they have run, and and quiz the instructors if at all possible. Learning the wrong things is even more costly than merely wasting your money.