Hi! Newbie Here!

[FairladyZ40th]

Hi everyone! Name is Miguel, you may refer to me as Mig. I recently got my self a 370z 40th Anniversary 2010. I got it with a full exhaust system and rims already on it, lucky me X). The car hasn't disappointed at all I got it for my birthday on January 2015. haha I have many things I wish to do to it unfortunately I'm on stump as to where I should begin :/ I was hoping maybe some of you could point me in the right direction?

At the time being I'm avoiding major improvements or expensive ones such as twin turbos, exhaust system. I was wondering if I should do a stage 1 clutch or stage 2? How should I proceed? Install it off the back or do I need to do other upgrades first so I don't wreck the power train or transmission? I have a Quaife diff. On sights but it's pricey . Do the cars come with a tranny cooler? Power steering cooler? How beneficial is it to run these systems? Sorry I have many questions ...