With increased levels of free time and disposable income the future for restaurant management should be pretty good. If you just think about the number of times people of your parents' generation used to go out twenty or thirty years ago, you can see that eating in a restaurant has grown in popularity. Depending on the type of restaurant, the profit margins may be very narrow indeed. Equally, even if you do work in a world renowned restaurant offering haute cuisine and only the very best wines and service, you will still need to ensure that waste is minimized and that the business is marketed and run efficiently to ensure new and recurring customers.
You may study subjects such as health and safety, accounting, recruitment, personnel magnet, pay roll, stock control, marketing, and service. While you may be more interested in a management role, if you are to work in a team effectively, you will still need to understand other people's jobs. The restaurant industry employs many casual staff, and on occasions you may find that you are missing a team member, or somebody has failed to show for work. As a manager, you may be required to solve the problem, or even step in and help.
There are many different types of restaurant. You may find a management role quickly within a fast food restaurant. Competition for more luxurious restaurants is intense, so you may have to accept a very junior role to start your career. Hotels, or even self-employment may be an attractive option for you.