Definately not too old. As Saffy said you would be a spring chicken in the midwifery field.

I too did Bachelor of Nursing first, worked as an RN for 2years and then went on to do midwifery. And like the others said you can do midwifery without doing nursing. I would recommend doing both if you can for a few reasons. As a child/Teen I wanted to do midwifery so did Nursing first as at the time that was the only way to become a midwife. Now my child bearing years as basically over my interest in midwifery isn't as great as it once was and I find myself drawn to other areas in nursing not midwifery that I can relate to in my own life (like mental health, palative care etc) Been an RN also means I can swap and change between the two. You may find years later that been a LC isn't as rewarding anymore for example and if you have more then one qualification your able to select a much larger choice in careers. Nursing does open so many doors where as midwifery only a few incomparison.

I had DD1 when I was still in highschool. She was a baby when I started nursing and I was soon doing it as a single mother. I was 18. It took 3.5years for me to complete and I finished when I was 21. I started midwifery when I was 23 and fell pregnant with DD2 when I had just started it. DD was born 10months into it and I completed it when she was 12months old (took some time of in the middle) It is definately do-able with a young family.