How can one reconcile excelling in studies with learning karate all the way to obtaining the black belt?

There is no objection to a woman practicing sports that suit her nature, provided she adheres to Islamic guidelines and avoids types of sports that are unsuitable for her. She must choose what suits her, such as walking and running, while ensuring that it does not distract her from her duties or waste too much of her time. Care should be taken to utilize time for what benefits one in matters of religion and worldly life.