With such a topic so broad we truly try to cover the basics from all angles in this group. Nothing too big or too small. Nutrition is as significant if not more as exercise is to reaching your goals so learn all you can.
any creatine that is 100% pure creatine monohydrate with the creapure stamp is ok. there have been a number of posts made on this topic. try doing a search in fitbuddy at the bottom of the screen.