First, don’t. Second, don’t. Third, don’t. And if I haven’t dissuaded you yet, book a session with a psychotherapist. Few businesses have a poorer success rate than restaurants—the majority fail within the first three years. Running a successful restaurant requires a very different set of skills than smoking a prize-winning brisket and achieving the latter gives you no guarantee you’ll succeed at running a restaurant.
If you still want to open a restaurant, I suggest first getting a job at an existing barbecue restaurant (or any restaurant) to see if you like it. You might even learn some skills should you decide to persist.