If you wish to have a professional career in ballet, then you shouldenroll in a professional ballet training program. Not just anyneighborhood studio that offers a few ballet classes, but a realprofessional school with graduates who go on to professional balletcareers. And yes, that will involve at least 6 classes per week.
I cannot say whether or not ballet should be a hobby for you. That alldepends on what you are willing or able to put into it. It takes manysacrifices and a huge amount of dedication to make it to theprofessional level.[/i]