This is key - however, sadly, its not taught at any school i went to. Your only ever taught how to be a good employee! Even before i even had my 1st job, i could do a Employee Tax Return.
The mental skill set to be your own boss should be taught at school level - the catch is - if teachers could actually teach such info, then they would have to actually contract in special teachers to do so, as the Full-timed teachers teaching you have NO IDEA (bit a catch really).
Im 33yrs old, and just spent over 1yr fully self employed. Massive learning curve and still learning. In the next 2wks alone, systems i put in place 5wks ago should see me earning full time $$ with part time HRs.
What that means, is now i will have time and money to do the things i love. Imagine learning this fresh out of school and taking say 3yrs to learn instead of 1. That would be a 20yr old working 3-4yr a day and training 3-4hrs per day and still having time for a life outside.