Hi, Check out this blog post about starting a business in the United States as a foreign national. You'll find steps to take and other considerations, like details about taxes.

Probably not. You can start a business with a green card, but the Tourist Visa is for tourism. To start a business you'd need a social security number. That only comes when you apply for the green card.   However, there may be a way if you can stand the hassle and cost. Maybe you can apply to USCIS to change your visa to something else. Consult the USCIS website or the nearest field office in your region (alos found on the website).   Best wishes.