There are general ways to earn:
1. Freelance (Websites or Mobile Applications, bots, or other kinds of stuff) - Tough Competition
2. Make something like kworb.net to get revenue from ads easily (side projects) - Learning + Growth - Time Consuming + Other costs are there
3. Teach stuff online - like hourly sessions, booking slots, or reviews of something like that - Easy to set - Time-Consuming
4. Live Streaming - Talking about interesting things in general, about yourself - your opinions - Easy to set - Takes time to get monetized
5. Bug Bounty - Look up for bugs - Put it in Social - Report and if you are in luck - you get paid - You have to spend some time
6. Sell courses - This works only if people trust you xD - know what I mean - Time Consuming
7. Collaborate and Write articles for major product-based companies and get paid - Digital Ocean, NameCheap, and others are there too - Again takes time
Everything takes time lol