For girls, the advantage is that boxing will carry out a lot of aerobic training. If you don't work hard, you won't become stronger, which will make your sister have a calm and quick-acting temperament. There are fewer girls in the gym and more uncles. You will be a treasure if you go. The disadvantage is that boxing wrestling is the most effective self-defense, but it takes a long time to lay a solid foundation for actual combat. I've never seen any girl fight in actual combat. If you don't wear a helmet, your face will be covered with flowers and plants, your teeth and nose will bleed, and you won't be completely injured if you take good protection. Boxing is easy to get started but difficult to improve. Put the hook straight and dodge the defense with your feet, which will be simple to the extreme. If you don't really like it, you will feel bored. An action is tempered in order to hit the opponent with the coordinated strength of the whole body at the fastest speed. You don't want the brilliance of Taekwondo here.