Some writers find it easy to create worlds from the ground up. They design mountains, valleys, forest, rivers and lakes, cities and villages. They populate their worlds with people who are like us, as well as with those having superpowers.
There are languages and clothing and foods that suite that world, perhaps even as identifiers of their position in society.
Just like in our world, some in the new world will be peaceful, others warlike. Some meek, while others aggressive. Some are masters of yoga, while fight with weapons.
Your task is to design a new world. Draw the outer borders. The seas and mountains. Inlets and ports. Where resources are found. Where are the farms and ranches?
What type of government is there? How do individuals get in power? Are they compassionate rulers or despots? What are the main rules that impact ordinary citizens?
How do the different peoples get along? With understanding or with conflict?
When you are finished, look back at your design, paying attention to what should be added as well as what won’t work or those things that need to be change.
If you have a storyline, start writing!
Have fun with this one.