From a NA owner to another I suggest you just do cosmetic mods since not much we can do with performance. I have nothing against going performance but you would need deep pockets to see gains.
In my opinion, buy some rims, coilovers, new bumpers, sideskirts, black kidney grills, etc. But if you want sound then I suggest an exhaust, intake, and for performance go for a real tune or for a cheaper route piggy back tune (BMS PBX), and that's about all I can suggest.
By the way enjoy your car
