Here is something that I hope will give you lots of encouragement as you make your mind up about entering nursing.
"Ive learned that the best classroom in the world is at the feet of an elderly person." -- Andy Rooney
Although I do not consider 49 "elderly" -- I am 50 myself -- we do have a handle on life in ways that younger people do not -- not of any fault of their own, we are just older and acquired a lot of our knowledge and wisdom at the feet of "others older or more elderly" than ourselves, as well as having gone through so much of the "school of hardknocks" by the time we reach the 40 year mark.
I entered nursing school in my early thirties. I was married, had three elementary grade children, a big house to clean, and two dogs to care for, and I was nervous as heck, too!
I had been out of school about 15 years when I decided to "go for it"! You are still "young" and at 49, you still have a lot of life left in you. You'll probably even appreciate returning to college now since you are more mature, and beyond the crazy lazy days of yesteryear! :chuckle
So, go for it! You already have a college degree, so you already know what to expect study wise, instructor wise, etc. Just let yourself enjoy the experience, have fun as you learn nursing, and be passionate about it all. Otherwise, you may not enjoy the ride much!