Seeking suggestions

I am sure of this career path, what I am not sure of is how to get started.... have you ever started something that isn't really "out there" career-wise?  Do you have some good ideas of how to get a new career started in a field, which is different than your current field?  If so, I would love to hear your ideas, suggestions, thoughts? Even if you haven't done it but have some good ideas, let me know.