I just finished a 31 year career in education. Some of the best teachers I've worked with were mid career changers. They were mature, hard workers, and knew how to deal with kids. But, a good number of them also had a difficult time dealing with kids and were more "subject" oriented. And some were not prepared for the political BS and pettiness of a lot of school systems and other teachers.

I am going back to school for a different career starting in September. I am also wondering how I will "fit" with others in my new field. But, you can always change your mind. Go for it!