How do I design a fantasy world?

I'm trying to create a fantasy world for my novel. Where should I start?

Start by defining the core concept of your world. Is it high fantasy with magic, or more grounded in reality?

I want it to have magic and mythical creatures. How do I incorporate that?

Consider the rules of magic in your world. Is it common or rare? What creatures exist, and how do they interact with society?

What about the geography? How important is that?

Geography shapes cultures and conflicts. Think about mountains, rivers, and climates that influence your world's societies.

Any tips on creating unique cultures?

Develop cultures based on their environment, history, and beliefs. Consider their traditions, languages, and social structures.