How the hell does one get started in Media Buying?

I'd like to give media buying a go. It seems like that's the first role within the career path trajectory I'm looking for.

How on earth do people land the Junior Media Buyer positions when every time I see them listed, it's on 1-3 years expereince (FOR A JUNIOR ROLE). How does that make sense?

How does someone start out in a very ground floor entry level media buying role?

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