To become a fashion designer after 12th in India, choose any stream—Arts, Science, or Commerce—as most fashion design institutes accept students from all backgrounds. Next, prepare for entrance exams like NIFT, NID, or UCEED for admission into top design colleges. Enroll in a recognized course such as B.Des in Fashion Design or a Diploma in Fashion Technology. Build a strong portfolio showcasing your creativity and design skills. Gaining internships and staying updated with fashion trends is essential.