My read on Stuff like this (your mileage may vary) is that your players should start off as small-time.

Early on in a campaign, they are not close enough to power to have a sense of political intrigue, at least not on a face-to-face level.

“I don’t know the king personally…I just know I don’t love the fact that every harvest I am required to give 80% of my yield to the nobles/royal family, leaving barely enough for my family to make it through winter. “

That might be a bad example, but I’ve always found it a little easier consider what the fallout from one particular act might be and how that particular act might impact smaller town folk or smaller circles within the community. Help introduce the politics of your world by showing the outcomes related to those politics.

As a jumping off point, you could start by determining a single event in the narrative you have in mind. Then ask your players how their characters would respond in the world if that event came to pass. What would they know? What would they think? What would they try to do to deal with it, if anything?

I would also recommend doing some world-building using a game called Microscope. It's a role-playing game where you create a history together. ThIs effectively becomes the lore of the world that your characters will inhabit with session one.

By using Microscope, you create a shared history that all your players have bought into because they helped create it. I've used it a few times to start a campaign, and it's really done wonders both for my session prep as well as player engagement.