I had that same question when I started about two years ago at age 60+. It is still true that our mileage may vary from individual to individual but what is important to you? Being true to yourself and being free to transition was, as our brother Tysilio says, "is the the best decision I ever made"!!!!
A favorite bumper sticker, "Don't Die Wondering"
So much will depend on your individual needs but for me this is wonderful.