​How to start a business with no knowledge?

I want to start a small adventure (dirt bike/mountain bike) park and don’t know what to do to start. What advice would you have for someone who has an idea but doesn’t know how to start a business?

My first inclination would be to buy the piece of land that would be appropriate to start a park like this…. I am planning on building it myself with my husband.. getting an LLC, liability insurance… then what? How can we track profit once we start making a profit? Is it possible to get a loan or should we try to do everything ourselves?