check out a few options. pr and kaplan both have online courses. but i think kaplan's is not a real-time one. veritas has a new online course. don't know the details. just noticed it on its website. manhattan review has a good virtual class as well. it uses webex, the leading webinar platform. i heard the class size is not big. so you will get your money's worth with the paid time. also you can try the first class for free. i attended their in-person class in new york and also got the access to their free online libray. there are about 60-80 hours of recording from different professors. i viewed data sufficiency sections many time.
it's included for free if you are a virtual course student. good luck. more questions, let me know.