It takes real effort for girls to beat boys in a fight. The effective way is to learn, learn boxing and fight freely. Like martial arts, these are slow and impractical. It is certainly no problem for girls to learn practical projects and fight ordinary boys for a year or two, but first they must be able to bear hardships. As the saying goes, if you want to hit someone, you must first learn to be beaten. Learning is hard, so you must think it over.