Tina Akhoondtabar became the world female boxing champion

This means no martial arts gym that “also” teaches boxing should be your choice.  If you are interested in becoming a well-rounded martial artist there are gyms for that, but MMA gyms do not usually have the necessary quality of instruction, or the quantity of sparring partners necessary to mould a successful amateur boxer.You’ll also end up sharing the mat with ground fighters such as BJJ or wrestling trainees, which is not beneficial for your boxing evolution.