Calculator and simulator of loans

I am thinking of getting a house and I am looking into options to get it right. Because I have never done it before, I ask a tone of questions around me about how to do an amortization for the loan. To get an idea on how to pay it over the course of the years is very hard, because there are so many parameters to take in consideration. I found this great tool that I recommend to everyone who is in my situation. A cool interface with a simulator that works as a loan calculator for getting to know