hi,

see there is no maximum age limit applied to do a professional related course, or any other certifications course, now a days there is many online certification course or part time institution where you may get your course done, there is many private institute available where you can do 6 month to 1 year culinary course or cookery course.

https://www.chefiica.com/course-detail/advance-diploma-in-culinary-arts

https://www.palcookery.com/courses.html