Changing careers at 10 years into a job, is it realistic? (update)

My layoff made me rethink whether to stay in my field. I have read a lot of threads here and could not find my exact situation. My family is supportive but nervous. How did you start?

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.

I took a small pay cut for a year, and it was worth it for the growth afterwards.