You need more than just speed as a race driver. If you really want to generate the money to race and want to go the sponsorship route, then you'd better start getting better at being an entrepreneur and dedicate yourself to the business world.
In this video I want to give you some important pointers but also to ask you to watch season 2 of the Undercover Billionaire. Especially the Grant Cardone parts because he uses marketing tacics that could help you as a race driver.
You can watch it on Amazon Prime or the clips are also on YouTube - https://youtu.be/DrKEq3VCpaw
Watch, listen, learn and apply.