Business ownership question

I am a junior in high school and have decided I definitely want to go to college for business ownership/administration, with the goal of owning my own successful business someday. However I do not come from a rich family so I don’t have money to just go ahead and start a business, so obviously I’d need a job with decent income before I can start my business. I was wondering with my business administration degree what decent-income jobs would I be able to get that would allow me to start my own business?

Thanks in advance for advice

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