****o Dave,
Nope, you're not too old if nursing is something that you'd enjoy and get job satisfaction out of.
I'd check around for nursing programs in your area.
http://www.4nursingschools.com
Take the fastest route that will get you to an "RN" license (probably a diploma or 2 year associates degree program). Do ask about waiting lists (can be 0 to 3 years at times). See what credits you already have will transfer.
Getting an LPN is faster, less school, easier and will pay less (RN's make 40K-60K in the Northeast, LPN's 30-45).
Keep in mind, like plumbing, nursing is physical and you do tend to work for you money. It is a difficult and demanding profession, make no mistake. Call it the toughest job you'll ever love.
I went into nursing when I was 27 and have few regrets. Once I had some experience, I've never had a hard time finding work. My first job out of school was in a hospital doing med/surg/tele that prepared me for going into other career options as well.
Job outlook? For nurses, the shortage we're in will be ongoing for the next few decades. Plenty of work, above average pay (though many would argue we are not paid enough for what we do), flexible hours once you are experienced.
Unlike most 9-5 corporate jobs, nurses are needed on days 7-3, evenings 3-11 and nights 11-7, or weekends 7am to 7pm, weeknights 7pm to 7am and other shifts in between. Meaning, you can adapt your schedule to your lifestyle or childcare needs.
To help you decide if it is for you, check out Nurses' Views of The Nursing Profession,
http://www.nursefriendly.com/views
They are articles written by nurses on why they would, would not recommend nursing to others.
Hope that is helpful,
Andrew Lopez, RN
http://www.nursinga2z.com