How would i start my own business?

i want to start my own company. i have an idea of what we would produce/ the services we would supply. im only 17 though and still in high school but i have been chosen to work for British airways next year when i get my a&p licenses. any ways the thing is lets suppose your income is around 40k-60k a yr how would... show more i want to start my own company. i have an idea of what we would produce/ the services we would supply. im only 17 though and still in high school but i have been chosen to work for British airways next year when i get my a&p licenses. any ways the thing is lets suppose your income is around 40k-60k a yr how would you start your business/company as a 20 year old with that income, given that you have no other expenses because your still living at home.
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