Design to Marketing? No shock there.
I actually self taught in design then took advertising and marketing communications- which included many design classes. I loved the design classes because by then I’d had 17 years experience. The classes were a breeze and I was happy to still learn a lot.
Media related careers are a black hole of learning and also exceptionally diverse.
I get bored of fast if I’m not challenged or there’s too much or too little repetition. Media is perfect for someone like me.
But, like you said, marketing is an adventure. Don’t expect to find the end of the road; it doesn’t exist. Lol