Some good resources:
https://wiki.unrealengine/Videos
https://wiki.unrealengine/Main_Page
https://docs.unrealengine/latest/INT/
://www.worldofleveldesign/
Do you just want to do level design or also 3d art? 
Some good resources:
https://wiki.unrealengine/Videos
https://wiki.unrealengine/Main_Page
https://docs.unrealengine/latest/INT/
://www.worldofleveldesign/
Do you just want to do level design or also 3d art?