Sick of working in public sector making crap pay, what programs can I begin to learn to get a good paying job?

I know Microsoft Word and Apple docs. I know a good amount on Windows Excel and Apple numbers. As far as anything else I have either little or no experience. I have a criminal justice bachelors and have worked public sector since graduating from college 6 years ago. I have so many friends who work from home but they [almost] all use unique programs for their work. What are some of these programs/systems I can get my feet wet with? I would prefer to work from home nonstop if I could.

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