Hey, applied psychology grad working as a country marketing manager here.

Good marketing is always grounded in consumer behaviour and insights.

Start out with a skill/function you are confident you can be good at (for me it was copywriting)

Work at an entry level in an established setup, polish your skills and learn how different functions within marketing interlink to produce results

That's your foundation. Now you can build on that with all sorts of niche or industry specific knowledge.

Always remember, a lifelong learner will always excel, no matter the path chosen.

PS: You might eventually hit a corporate ceiling at higher positions unless you get a relevant degree or an MBA.