There's no easy way to make money online, every method I can think of requires some sort of skill (surprise surprise) or initial investment (time or/and money). Just think about what you like doing, even if its just gaming, you can for example start a youtube channel and provide useful content there. Like I said before it will require a substantial amount of time before you will start earning something decent.
At the moment I'm learning web development. Started in August, trying to code every day for atleast 2hrs up to 10hrs a day on some days. Now I feel like I have built up a decent stack and understanding of my field and I will start selling my services soon. Hopefully I'll make some money, haha.