If you have skills with the hardware you could try flipping computers. I does, however, require upfront purchases and a constant trickle of money for parts. The customers can be rather unfriendly sometimes because they think that you are to blame when they download stuff from every clickbait ad they see on their social media.
Flipping things in general might be a good "soft start" for business. Buy things locally from CL, kijiji, thrift stores, estate sales, people in need of money for rent, etc. Clean the stuff up and sell for profit locally or online. Some practice in good ol' buy low sell high. The best way to learn business is to be in business. This will help with your social skills. Sales is an amazing skill.
If you want a few dollars from your pc, your could look into amazon mturk or clickworker. They allow you to do menial tasks for menial pay (below min wage by a lot).
You may also want to look into amazon KDP and writing some ebooks. Write your book in a normal text editor (they can even be article sized nowadays), upload and convert with their tools, "publish" and wala. They get 30%, you get 70%. It might only get you a few bucks a month per work, but hey, it's something.