Welcome to part two of my ongoing series of introductory Infinity the game articles. This edition covers game mechanics and how they differ from 40k but it will not teach you how to play the game. You'll need to read the Quick Start Rules or main rules (see the end of the article for links) to actually learn the game. The QSR are a good start but be aware that a few areas have been simplified in them and are slightly different in the main rules.
First off, here's a quick comparison of the dice requirements for the two games: