classes in the evening, no free time to walk the dog ?

Sheba here, the https://www.akc.org/dog-breeds/german-shepherd-dog/ (German) shepherd in the family. My friend says that soon he will not be able to walk me in the evenings. That's what i really love to do, i wait till he gets home. He says he has to attend a night class because he is planning to a CMI Business Management Exam. But I don't want to stop him from his studies however i don't want to loose my walks too. So I am asking you guys if you know any CMI Biz. management courses online. which are recognized , please do share , so i can ask him to follow them at home without attending the evening classes. Bow Boww..!!