Are there any secret side hustles that your gatekeeping?

Hi, my name is Norris and I am 14 years old my girlfriend birthday is coming up and I started to think how can I come up with money online because I just got my first PC now I started to think there might be side hustles that people are keeping to themselves so I came on here to ask if anybody has any easy ways to make money that might not be as mainstream because when I look at these faceless YouTube channels or TikTok, I get confused on a lot of stuff and I just end up quitting because I don’t understand now I’m pretty smart, but it’s just hard to understand this online stuff. Can somebody please guide me in the right direction to start making money online or share with me a side hustle online that would work for them and got quick results. Her birthday is the 28th of June this month so I don’t have much time.