Camera System

-Forget Euler Angles
-If you fiddle with trigonometry (except for creating a rotation matrix), you might be doing it in a pointlessly hard way
-Ignore everyone that says you _must_ use Quaternions (especially if they babble on about them as the only way to avoid gimbal lock)
-Read up on matrices and transformations
-Understand world and local/object space
-Build a simple matrix-based camera to move/rotate (if this has more than creating/multiplying and maybe zeroing/resetting the translation part, you might be doing too much)
-Google for simple spring/dampening equations, if you get tired of a completey undynamic 3rd person camera
-Have fun coming up with ways to avoid camera/object collisions and keeping the player in good view (many commercial games suck at the latter, so don't sweat it)

-Last but not least: use the search function, because "my camera is doing weird things"-threads are posted almost every day.

Thanks for the great advice, but does anyone have some liks to good tutorials

A decent one ( when I started out, but still comes in handy to reference to ) can be found at Apron Tutorials:
Clicky!

Good luck!