I wanted to learn a martial arts soley based around shield combat, but I couldn't find any. I've decided to create one but have no knowledge of how to create a martial arts. What do I do?

Will I would do first look stuff up what kind of martial Arts u would like to do and I would first learn it befor becoming a teacher if that's what ur saying or look up what ur into and go out and learn it first it will take time but I will get there