nokia 6120 & viruses

Hi everyone.
So now I've my first symbian/java mobile....
I want to start playing around installing some stuff, but ....
I'm a bit worried about viruses that I know exist also for these platforms.
So, my questions are:
-1 Does my PC antivirus (NOD32) detects also symbian/java mobile viruses,
before I install them on my mobile??
-2 In case not ... What else exists to scan for viruses .sis and .jar files
(possibly freeware)????

thanks in advance ....