Go from Blender to Koikatsu

I recently started making a game, and to create the environments I wanted to try using Blender, but I don't know how to transfer that to Koikatsu Party. I'm new to this and I'm quite lost.

Is it possible, or should I abandon the idea of doing it in Blender?

I'd like to create custom maps, so I'd like to know of any software that's compatible with Koikatsu.

For things like this, I would like to modify the scenarios

https://preview.redd.it/vrjwthy8by6g1.jpg?width=895&format=pjpg&auto=webp&s=d65c5c7a5548ecb50c3f8ee021aa4ff450ea8f67