Take it slow when adding extra layers (Matrix, astral, rigging, etc.) to your game. The rules are far more complementary than they were in previous editions, but can still come off as overwhelming to new players. The modules Mystic mentioned are all good places to start (I'd avoid Splintered State), but many of them as one or two elements that could easily TPK a new group, making for a not-so-fun experience. Make sure you read through whatever you pick carefully and maybe check back in the forums. Many people here are more than familiar with guys like Quaid and the Founder.