First of all much success to you for making such a great decision and career change! I know it might seem scary, but you will find employment. You have many choices: public, private and charter/community schools. I'd start connecting with a local school and volunteer - you'll get experience and they will get to know you. Yes, being in your 50's will be a challenge, but I believe you can do it. If you feel the calling, students need you. Consider getting a certificate in Reading, Math or Science as well - that will make you more marketable. Yes, you will be competing with many young people, but while you may be a new teacher, you have valuable life and professional experience they don't have. Think of the skills you gained in your life and how they transfer or relate to education. Then when you're ready to interview, share how wonderful and skilled you are.
I found this article you might like: https://www.bachelorstudies.com/article/4-Reasons-Why-It%E2%80%99s-Never-Too-Late-to-Become-a-Teacher/
Much much good luck in your journey,