So i have a Job Interview Today...?

And I've been trying to prepare for the dreaded question "what's your greatest weakness?" how's this response? "I believe my greatest weakness is my lack of job experience as I have never held a legitimate job before. But I have taken steps to make up for this inexperience by being an usher for my high school's plays where I had to greet the audience members and help them with anything they needed. I also was a part of my schools keyclub which allowed me to work in the concession stands at sports games, giving me experience at selling food to customers. My work as a yardcleaner also taught me the values of hardwork. If I didn't get all the trash out of the yard, I didn't get paid for the day's work. Even though I have this weakness, I believe I have taken steps to assure that it's not a problem."