DotA 2 Select a map WTF ?

Im so aggressive right now i sit here in front of my Computer played the 3 day Tutorial and want to search a online game and this FCKING GAME TELLS ME TO SELECT A MAP !? I dont find anything to select a map there HELP ME IM SUCH A BIG NOOB.
sry Caps.

Silver ...

Go on Preferences ..that's where you can select the game type and server region..

THX :D