My daughter is 19 and currently enrolled at Divers Institute of Technology in Seattle WA.
She loves it. She is one of about 5 females in the school.
They offer a 7 month program.
You can check them out on line at
www.diversinstitute.com
They were the technical advisors for the movie Men of Honor and trained the actors. If you have a DVD copy check out the special features section. They did a short informational clip about the school and the training.
Good luck. Look for a program that offers many certs.and a wide variety of training. Rumor has it that DIT is the best training facility in the world. Many if not all of the instructors either still work in the field or have many years experience actually working as a commercial diver. Many are retired Navy divers.
The training is not cheap. The school is tough. But if you love diving and this is what you want to do you can do very well. Just remember as a woman you will have some issues to work thru. Every "diver" must prove themselves, as a female diver you might have to prove yourself more than once. But the payoff of doing what you love is worth the additional effort IMHO.
On a personal note ~
My daughter is not quite 5' tall weights 110 fully dressed.
She is ranked second in her class. One older ex Navy diver is #1. She is the youngest and the smallest in the school.
Hope this is helpful. PM me if you would like to talk about this more. I am sure my daughter would be willing to exchange emails and let you know how it really is being a girl in a mans career ~ At least the training side of it.