As a man with professional qualifications on here (that’s me btw) my advice would be to self study in order to grasp the main concept of what it is your studying, but then enroll onto a classroom base course as you can ask any questions to a lecturer and he can help you understand anything you are uncertain of. Also it is possible to self study but then like the Open University degrees, it is much harder knowing what is important to spend time on and what is not so important. I would suggest doing both to give you the highest chance of success. Good luck with it.