Typically need an associate's or bachelor's degree in fashion design.
The minimum required school is a bachelors degree.
It would be good if you knew how to sew when you start being a fashion designer.
As a fashion designer you can design more than just human clothing, you can design doll clothing, dog clothing, and any other animal clothing.
It would be good to have experience in sewing, sketching or drawing, and taking art classes will help too.