This may surprise you, but you know Windows better than I do. I use a Mac in my day-to-day computing. I host my website on a server running Linux. Over the past 16 years the only times I've used Windows is to open a browser and test websites that I’ve built, a couple of hours a month at most. If you want me to "fix your computer" all I'm doing is googling what's wrong and following directions that I've read, skills we've both learned early in life.
In reality, I'm more qualified to clean the windows in your hame than I am to support the Windows on your computer.
Back in the 80s, I worked a 13 hour, three day a week job in computer operations at Computer Associates, that schedule gave plenty of opportunities to educate myself and for overtime. I know fast food can't be more strenuous, a job, but I'd give it a shot.