Earn something without using your own money? I’m afraid that’s almost impossible at your current situation already.
Bounty campaigns can be one if you don’t have any money, but it will take time before you can earn. Testnets from new projects can be as well, but most of them aren’t rewarding testnet users unfortunately, or if they will, it will not be worth it. Faucets? Completely gone already or if there is still, it’s not worth the time.