Hi @agung_putra, welcome to the Katalon Community!
Thanks for introducing yourself here. Since you’re just getting started, you might find this helpful 
: Elly’s Learning Journey – Week 1: Getting Started with the Katalon Platform Course.
It’s a great place to begin and also a good example of the kind of questions and reflections you might need to get started. Looking forward to seeing your journey with Katalon!
Bella