Hi there and welcome to Torquecars. Where are you from? You sound pretty sensible - getting some knowledge before you start modding the car. I've seen some horrendous messes where people with a little knowledge have really ruined the cars handling and performance and ended up selling the car.
Make sure you read through the articles on the main site
www.torquecars.com and post any questions you have in the relevant section on this forum and we can get you up to speed with tuning quite quickly.