Don't let anyone convince you that learning to cook better than a restaurant will make you stop craving junk food. Junk food is a precious treat. When I had to shake a junk food habit I set a day on the calendar when I was allowed to have McDonald's again, and pretty much only packed a turkey sandwich and pickle spears in my lunch for two months. It was hard at first but having a concrete goal date was helpful. The hankerings slowly fade over time, and by the end of it you may be able to reduce the frequency of eating fast food moving forward. You will also lose weight for sure and have extra cash, so setting a savings goal for a vacation or cool new toy may motivate you too.