A Little Guidance Please :)

Ok so Maya or for the object / architectural side of things.

So I am guessing UE4 is for using those assets provided by artist to create a complete world. I would like to make a career out of this one day so need as much information as possible!
Coding wise I have very little experience which is what worries me about UE4.

So as a user of UE4 do you mostly work alone with your projects, or do you call upon the help of 3D artists, environment artists and the like?