lol it is kind of cute seeing someone completely new to shooters talking about these things. not talking shit, just saying.
if this the first FPS you've really played, RP?
work on getting ghost pro, sleight of hand pro, marathon pro, and steady aim pro. those are the most important ones, IMO. here are the perks + pro versions and what they do
http://www.cod7blackops.com/perks/