I think you played it mostly well. You are correct to believe that you may have the best hand on the flop. Your bet on the flop was well suited to loose online action because you mostly want to pick up this flop now; however, the fact that it was called should be worrisome. You now have a situation in which the caller could be a dumb/tricky opponent calling with overcards and a draw, or could have a 4 or overpair. You then risked 1/3 the pot on the turn to get information on your opponent, and this is a proper play; his call told you he has something. Now, your check fold was apprpriate.