The most common answer that you will hear is to start with intake, headers and exhaust for performance upgrades. On the other hand what I like to recommend for you if your truly new with this vehicle is to just perform a simple tune up, engine air filter,spark plugs,wires,ect... you get the idea. This will get you familiar with moving around your engine bay. Other than that there are powerful tools such as (search) tab up on the top of the main page. Try to avoid questions like this, You will be surprised how many times this question has been asked. All the info is here all you need to do is find it ...well most of it anyways.