how do i save conan sand box edits and package for my game?

I am currently working on an edited map of the exiled lands Conan map for my pc server. mainly I am adding in grasslands and trees.

I am not new to modding, but it has been about ten years and I’m very unfamiliar with UE4 and steam. I am using the Conan dev kit, I read through some tutorials and have been editing the map.. before I got too far I attempted to save and reopen to check if I knew how to do that correctly… whatever I did wasn’t it. lol

I would love if someone could give me a simple walk through of how to save my project and turn it into a package for steam.

any help is very appreciated!