When I first started looking into making money online, I assumed it took a brilliant idea. Then I noticed that most people who actually earn don't have one. They have something simpler and much rarer: they didn't quit.
The biggest mistake beginners make is jumping around. They try affiliate marketing for two weeks, watch a video about dropshipping and switch, hear about freelance writing and drop that too. A year later they've tried five things and finished none. The methods aren't the problem, since they all work. The problem is that none of them got enough time. So pick one path, and don't judge it before six months at the very least.
Next, you need a skill people will pay for. The internet doesn't reward wanting money. It rewards solving someone else's problem. That might be writing, video editing, design, translation or ad management. Which one you choose matters less than learning it with your own hands. Twenty hours of tutorials are worth less than one project you finish and show to another person.
Try to build something that belongs to you, too. Your account on any platform can be shut down tomorrow without warning, and I've seen people lose years of work that way. A small blog, an email list, even a tidy portfolio will stay with you no matter how platforms change.
And don't skip marketing, even if you dislike it. You don't need to become an expert. You just need to understand how people find what you make, what they search for, and why they trust one person over another. The best work in the world stays invisible if nobody knows it exists.
Time and money call for realism. Income at the start is small and irregular, so don't quit your job overnight. Two hours every day, consistently, will do more for you than a full weekend followed by ten days of nothing.
One small piece of advice: stay away from anyone promising quick riches. Usually they're selling a course, and you're the only profit they'll ever make. Real work is slow and sometimes boring, and that's not a flaw.
You'll waste some time on things that don't pay off. That's unavoidable. What matters is that you come away with a lesson each time. Write down what you learned and keep going. Someone who stays a full year and improves little by little will find themselves ahead of most of the people who started alongside them.