Working as an online annotator may be a good choice. It does not require much training. Some company like Scale AI ( the CEO is only 26 years old?)...
If one knows electronics like computers better, it will be a good idea to check each online community like Craigslist, to see if anyone is looking to get rid of their used computer, smart phone, etc... collect them and refurbish, and resell online like eBay, or sell to an ITAD company...
For PC gamers, GPU is an expensive component. Check this post to find out how to sell gpu.