Sex is usually initiated by the guy so, so far, what you described sounds totally normal.
You can play the "innocent" part without any guilt or apology...if you really like him and he really likes you, the answers you're looking for will come along quite naturally....they have for hundreds of years!
Don't overanalyze the situation...the key is if you have legitimate feelings for one another, just be yourself and you will figure it out...if something continually feels wrong or uncomfortable, then you have reason to question.