Take a look at those links:
- https://wiki.unrealengine/Main_Page
- https://wiki.unrealengine/Videos
- https://docs.unrealengine/latest/INT/
- search for specific topics on youtube (there you can find a video about nearly everything)
For a team -> https://forums.unrealengine/forumdisplay.php?25-Got-Skills-Looking-for-Talent