It's time to get modding. Any recommendations?

I've steered away from modding so far, I am kind of squeamish about modding, I am digitally illiterate, so I felt like I'd mess up the game, but it's clear to me that there's no hope for the devs to do anything, it all falls to the people in the end.

I wanna make the gameplay a little more immersive. Either some kind of deeper diplomacy, interaction between the kingdoms or more options to play the game as, like landowner, merchant some kind of deeper variation in advancing the game.

And some extra armor, the selection seems a little short.

Anyone got any suggestions?