You can always get into boxing shape using your boxing gym that's what it is for but boxing is some what limited as a martial art because it only deals with punching if I were you I'd consider mauy Thai, mma, Krav Maga or even a traditional martial art however traditional martial arts general don't deal a lot with fitness
You should. Being in this world in your size is kind of dangerous. So get some fkng muscles in yo azz and learn some fighting techniques.
youll develop as you get older and put on weight, theres different weught divisions anyway so you can fight someone your own size
im 14 turning 15 but i look 12 lol im small lol im 5'2 and im really skinny . ive always been all my life. i have small hands and skinny wrists small feet .and boxing always had my attention ever since i was 7 but i never been able to join it . now i want to this summer but idk if i should because im too skinny and weak /: