Earning money with no money

If I wanted to purely earn money, and not have to spend money on items to startup a side hustle, or by selling all my belongings at a pawn shop, how can I do that? I have a 4 door sedan , and limited skills but I’m willing to learn

For example, you don’t have to pay to work a 9-5 job. You just earn every hour on the clock and take home the pay to use freely. How can that translate into the side hustle world?

I can’t find a lot of answers to this specific question, Is it really that hard to make extra cash? Is this why there’s so much poverty even amongst the people who work but live paycheck to paycheck?