Hi everyone.
I am a hobbyist but I have a little experience with Unity.
Just not with World Machine and UE4.
With Unity there was a tool called Gaia that allowed me to create 8k to 8k map and customize it in the engine by stamping different height maps built into the tool to add mountains, hills or dunes to the ground mesh.
All within a single tile. No idea how practical it was for a real game but it was fun and easy to build. Whats more it had a procedural generation of trees, textures, grass, bushes, rocks and etc…
It did a bulk of the mundane work which allowed me to focus more on the details and map issues.
With World Machine Basic I was able to make 505 to 505 island map for UE4.
And I got it into UE4 as shown on the image below:
My question is did I miss any steps? What do I do from here to make this island look realistic? Are there any tools to generate all the textures, bushes and trees? If I want to make changes to the island like make it less round or… just create an entire continent the size of Skyrim and have a system proceduraly generate the entire map’s textures and assets.
What and how do I achieve these results? You know besides paying a thousand dollars in software or quitting my day job to get this done?
Thank you everyone for your time.
I really appreciate any assistance you may be able to provide. 
PS. this is for a non-commercial project.