I graduated nursing school at the age of 51 years old. It was a booger because my brain didn't function or retain as well as it had the last time I attended school. So no, your are not too old to start. But, do not wait. Do your pre-req's. Do WELL on them. Your GPA can be what makes or breaks you. Start your dedication, because once in Nursing Program, you have no life. Join Nursing associations. If you have to work, start as CNA, and move up from there. That is all based on my experience. Good Luck!