I am new to Metric Studio,don't have any idea about it.Could someone please let me know where to start with
I guess the best place to start is by reading the user guide:
http://publib.boulder.ibm.com/infocenter/c8bi/v8r4m0/index.jsp?topic=/com.ibm.swg.im.cognos.ug_mm.8.4.1.doc/ug_mm.html
IBM also run a course too, but you may not need this if you're not planning to use Metric Designer.
Regards,
MF.