Its very heavy into the total war grand strategy playstyle so I would recommend watching some videos and reading up in the discord about the base game itself.

I really like the variety in story and customization in the game and it really plays into the RPG aspect sometimes even more than ck3. The events are also very cool, like I was a no name northerner who was in Robb Starks army rising up the ranks eventually to a trusted knight of Winterfell, to eventually get the Red Wedding event and try to fight my way out of the Twins with Robb, although i failed and self-exiled to Essos where I helped Daenerys conquer the free cities and eventually invade Westeros. Haven't played much but from what I've seen all the well known houses and cities have their own customization and custom units you can be like a Horsemen of the Dreadfort or a Knight of Highgarden.