No matter how good your world-building is, it won't matter if you can't tell a compelling story. So don't forget the story and the characters. You're still here to entertain people and the vast majority won't be, if it's basically just a world-building book.
Don't info dump your lore. Weave it into the story as you're telling it. Don't worry, readers don't mind not knowing the entire world and how it's built from page 1. It's also one of the best things reading fantasy, slowly getting to know the world as you're getting to know the characters.
Think about your choices. Why is your society built the way it is? Religion? Colonilisation? Natural disasters? Why is their society engaging in this or that thought process? Is there classicism, sexism, homophobia, racism? Why? What's it built on? Where did it start?
Researching why our world is the way it is today is actually good research into how to build your own world. Ours has been heavily influenced by certain nations conquering others. Crusades have had a big influence on certain countries as well. Does your world have a religion that is pushed or forced on people who don't share the same religion?
Lots of things to think about when you build a world. And you don't have to follow our world, our societal constructions, economical constructions, or even our perception of... Anything, really. Gender roles don't have to be the same. Get creative with it! And even if you don't explain why your world is the way it is in the story, it's still very useful for you to know.
Hope that helps!