Coming from someone in her late 30's I can appreciate your concern
I am just now going through the rigorous demands of the nursing process and with children it is no easy task. But look at it this way, time is going to go by no matter what so just do it. In the long run you will be glad you did.
With that in mind, just know that if you have to work full time to support yourself, this process is very time consuming and can be stressful at the same time. My school suggests that you should only work 8 hours a week once your accepted in the nursing program. Some people can pull off working part or even full time and I say kudos to you, there is no way I could.
Because of my age I have gone the accelerated, private, cost me an 'arm and a leg' route just to get it done. I would say your gender will have no affect on you being hired or not but that's a question to ask those that have more experience in the field.
Good luck with whatever you decide but of all things, don't let your age hold you back