Rotate springarm around topdown player

Ok so im used to just scripting things directly in game engines like unity. so if anyone could point me in the right direction for tutorials that would be great. id love to give ue4 and the blueprint system a shot.

ok so im using the default topdown game template.

what im looking to do is have the springarm rotate on the z axis when i press rightarrow and left arrow.

so i add in the left press event and what do i need to add to rotate the object while its pressed?
ive tried all the differant rotate options i see but none seems to link up.

where am i going wrong?