Hi there,
I think it's great that you're considering going into nursing now. At 37, you are definitely NOT too old! There are a few "older" students in my class, a few in their 30's, a few in their 40's and 1 in his 50's. To start with I would recommend getting your CNA certification, it was required for us to get into nursing school anyway, so you may need it depending on your school requirements. Once you get your CNA, you'll get a good idea if nursing is what you want to get into and if it's the right thing for you.