You could do what I'm doing, and thats go to a college, and major in "Exercise Science". Extensive background of anatomy, strength training/techniques, along with nutrition, and overall health. 4yr bachelor degree, with masters, and PHD's an option as well. A good buddy of mine who just graduated, and is doing his internship down in Daytona Beach, FL, already has a job offer starting at 35K a year for a club in Miami, so the pay certainly isn't bad.
Brian