You can learn almost everything for free these days. Also, based on my experience working in advertising and tech for the last 30-odd years (plus some side hustles, such as being a barman), you only really learn by doing, not by studying. Yes, you can attend degree courses, seminars, read books, listen to podcasts and so on, but it is only when you actually do things that you truly become a professional. The hard part, of course, is how to start. That mostly depends on luck and your network