Thanks for introducing yourself!! We are happy to have you!
When I first started using SP, I tried to get as many Spark Points a day as I could. This helped me really get to know the program and I learned a lot from reading the articles and taking the quizzes. This is one of my favorite quizzes on the myths of weight loss: www.sparkpeople.com/resource/quizzes_start
Be sure to read all the explanation and visit the links to other articles and resources within them when you have the time.
When are you hoping to lose the 4 kg by? Spark's program is designed to help you lose about 0.25 to just under 1 kg a week, depending on where you are starting from.
Good luck and happy Sparking!!