Welcome to the club, Ayhan (I'm guessing it's pronounced similarly to "Ian" correct me if I'm wrong).
As it's been said, mods are a personal thing. Think about what you want the car to be, not only in terms of its looks, but practically as well.
For example, I drive my car everyday and long distances, and while it'd be nice to have a car to put on the race track, that's not going to happen, so I won't be looking to make my car the fastest things on the street.
In the end, it comes down to what you want and how much money you have to spend.

Blitz Air Filter | RPW Stage 1 ECU Flash Tune | UR Front Tower Strut Bar | UR Rear Lower Bar
Alpine iDA-X305 headunit | LED Taillights | VG Sharkfin Antenna