Convert Active Income into Passive Income

[Qaideth]

Hello, I am a young person who has just graduated from high school at the age of 18. I have decided to postpone university for 1-2 years to develop myself in various ways while I have the time and financial means. Currently, I am working from home and have enough income to achieve financial independence. I contribute a portion of this money to help my family, but there are many other things I want to do that require additional funds. My desires are not just childish whims but concrete goals. To achieve these goals, I believe it would be logical to start generating passive income as a first step. Can you suggest ways for me to generate passive income? I am not looking for instant cash flow as I mentioned earlier, I have time. I am planning to start a Udemy course soon. Additionally, I am considering opening an internet site, but I am not sure how viable it is. I am looking forward to your advice. As I write this message, I realize that I am losing sleep trying to find ideas. It's already 5 in the morning! ????