How to create a area on map 8 by 8km area rectangle, and render it with highest quality?

LeonMaximilianTembrink

Hello i'm completely new to GIS and im close to a mental breakdown as i understand nothing it's so complicated and i always take the wrong path lol.

I want to recreate this: https://community.esri.com/t5/arcgis-pro-questions/using-arcgis-pro-and-unreal-engine-4-for-terrain/td-p/12805

So i have the 4 coords of my area its a rectangle and for each corner i have the coords.

Then i want to only have this area visible inside Arcgis pro.

Then i need to create a supervised image classification?

If i got my classification how i want, i want to export it with the highest quality possible and 8k image texture.
So i can use it as a splatmap in unreal engine.

I also found the "esri Sentinel 2 10m land cover" wich would be perfect but it's missing details such as streets etc. The area i want is chernobyl reactor so you can actually see yourself.

But i cant even get the satellite image to work im just dont understand how i can define a 8/8km rectangle inside arcgis pro and do all this, i searched every tutorial on the internet but cant get it to work. Please help me somebody.

Best regards!