Anyone have experience going to school in their 50s?

I'm in my early 50s and have been seriously considering going to school. I have performed manual labor for most of my working career, and though I truly enjoy it, my body cannot keep up anymore. A few years ago I began looking for work in an office environment, and after a a demoralizing year of submitting resumes, I landed a minimum wage job in a small customer support office inside a larger organization. The work was soul suckingly boring. I applied to other departments and received job offers, but management would not let me leave customer service because I have a way of deescalating difficult situations. I was eventually offered the customer support manager role, but I refuse to manage people. Since the company would not let me move out of customer support, I left them and took a long vacation. That is where I am at now.

I am afraid that an educational investment will not pay out the dividends that I am hoping for. I don't have all the time in the world anymore. I guess I am looking for career / school advice, or if not advice, similar journeys.