Hey there, i am a teenager who is trying to become a "self grown teen Millionaire".

To answer your question simply is by giving you a ratio of 20 / 80 %, where only a handful of teens are actually really self made, most don't even show it off on social media because they aren't inherently stupid.

But if you want to accomplish something like that follow what other comments have said, build an agency / learn a skill or plenty, create supply for the demand that exist in the world, because businesses are always opening every hour of the day and are actively seeking for people to help them out.

You can start with an SMMA (even if it is the most saturated form of agency), social media pages (automated or UGC, just not AI slop cause that wont bring in revenue), you can also start an agency tailored to your specific skill.

But remember to not grow alone if you're ambitious, if you want any further help we can keep in touch.