Changing careers at 12 years into a job, is it realistic? - 20 weeks in

After 12 years as a dental hygienist I am thinking about moving into a different field. I would rather hear the honest version than the polite one. I have a little time and a small budget for training. Has anyone made a similar move?

I began with informational chats, then a short online course, then a related entry-level role. It took about 4 months.