Changing careers at 8 years into a job, is it realistic? - 2 months and counting

After 8 years as a janitorial supervisor I am thinking about moving into a different field. There are 8 people counting on me, so I am trying to be careful. I have good customer skills and I am comfortable with spreadsheets.

You likely have more transferable skills than you think. Write down what you did, not what the job title said.