If you are trying to do it well, that is. If you learn some of the patterns, you might as well learn them all. If you have learned some of them badly, you will probably learn all of them badly. Then you will then have more ways of looking bad and less time to learn to look good. Hours aren't everything.
Experience also counts.
Learning to dance well takes time. I have danced with new 'instructors' who took the 'crash course' and no doubt put in lots of hours in 3 months and qualify to teach the syllabus. However, they can't dance. The body just can't absorb the material. I have also danced with long time instructors who can't dance.