It may be too late to find employment when you are qualified, as the cult of the young is still in full blast if you are over 50 and looking for any kind of job.
But don't let that stop you.
The satisfaction of finally qualifying as the midwife you have always wanted to be will be immense, and during your training you may well meet people who will realise that you have valuable experience and be happy to employ you as soon as you qualify.
If not, and you are willing to travel, I doubt that Doctors without Borders, The Red Cross or any other organizations that provides health care where the need is greatest will cavil at your age.
Go for it, and good luck!