A strong desire to be a chef is a good place to start. Having a good sense of smell, and taste will be necessary also. It would very difficult to prepare a good meal if you can’t decipher the differences from one spice to another; or if you do not know which spices go well together and which ones don’t.
There are stages to becoming a chef. You have to start at the bottom, but becoming a chef is one of few occupations where you can get most of your training on the job. You do have to go to school and train as well, but much of the training is done in a working environment.