She became so successful that she was able to leave her job and she never had to open a store. If this is what you enjoy, you can absolutely take courses, but you should just put your work on the internet without trying to sell it at first. Your hobby can become your business organically and you will be a professional with the first dollar you make.
Good luck! You got this!
"Education: Although formal training is not necessary to become a pastry chef, taking classes at a community college or culinary school can help launch your career. There are many degree programs to choose from, but you can typically expect to cover nutrition, baking techniques, cake decorating, food preparation fundamentals, pastry arts, plating, food service, and culinary management, as well as sanitation and food safety. If you go for a bachelor's degree, expect heavier coursework and details about the legal considerations for opening a restaurant or bakery". -Master Class
Bachelors is 4 years
Associates 2 years
I would recommend getting into the field first to get hands-on experience before enrolling and paying for school. Find a mentor near you / internship at local restaurants etc.