what path to take

I'm 19m and a goal of mine is to own a business i'm just not sure what type. I did one year of university at an art school and took a break because i'm not sure if it's a smart financial decision. Now i work as a mechanical insulator just because it was the first job i got and I have my own apartment so needed to pay bills.

I have an interview with a car dealer ship as a salesman in 2 days. I'm looking at this career because i love cars and it's more money that i make at my current job and i don't enjoy my current job. I want to own a successful business and eventually be making 7 figures I don't mind putting in 70+ hours a week if i have to.

I'm not sure what type of buisness though possibly an online business. I'm decent at graphic design and make comic books on the side for fun. I like designing stuff and i like building things.