I sympathise... I'm completely new to all this as well. And although it sounds easy, if you've got as little clue as me, it's a steep learning curve.
I'm a couple of steps ahead of you, insofar as I've figured how to use the terminal, log on as root, and get XAMPP installed. But it would be a case of the blind leading the blind if I offered any advice.
I'll be interested to see how you get on. Good luck