Just bought the monthly plan and wanted to start out today with the courses. But it does not allow me to continue the 365 data science program because I have to upgrade my account?

Yes this was the same issue even i am facing. I have subscribed for one month plan today early hours. Where my subscription still shows nothing on my account. this is so bad. also by time i made payment i suppose to get 20% off but i got charged 100% this is not i am expecting. completely disappointed.