well I think you should play some video games ;3 sometimes racing simulators are good places to learn about what does what.
But if you're not into video games I suggest you watch youtube videos on cars. Just in general, Motortrend, Drive, Top Gear, etc. Channels like those hold small infos about cars but once you pick some up you automatically start picking up terms and what they mean/what they do.
Basic mods like Intakes, Exhaust, and Wheels are really easy to learn
Just look up some stuff on the BRZ/FRS that pertains to those things and you might learn about the twins in general.