There really aren't any silly questions (except for the ones never asked), not in poker, and not in life... but those are actually very good questions.
The answers, however, could take awhile.. as poker and its conquest are a dynamic challenge. It's kind of like asking, "How do I win at chess?" Well, you take it one principle at a time, and you practice, practice, practice.
dealio96 gave you an excellent reference for an introduction to HUD statistics used in online poker.
Here (http://www.pokerlistings.com/strategy/beginner/seven-key-poker-stats-explained) is another.