Is there a place where I can see things such as dimensions for creating vanilla style buildings and such? I heard of someone who was developing a map a while ago, can I start doing that or do I have to wait for release? I want to get familiar with it now so I can get a head start.
I dont think there are any example files, but you can make the models based off of the Devlog videos and stuff. Thats what I did at least.
All I can say is start researching how to code in C# and use Maya.
Also Learning Unreal will help you in the long run for when UII comes out.