Materials and Help to build a Domotic project

Hi. I want to do a domotic house model built with Arduino and controlled by Internet. But I have no knowledge about it, so I need your help. What materials should I buy? (sensors, Arduino, etc.)(All will be simulated by LEDs)? And what do you recommend to start learning Arduino?

Thank you!

An arduino with a w5100 ethernet shield would be a logical starting point.