yea keep it at the cold level (when its cold) and it may have a little air in the system. It will eventually even out. If you look at the coolant system you will notice a hard line over the top of the engine in front of the upper intake and on that hard line you will see a little socket like thing you can remove. This is the coolant's highest point and where air usually get trapped. You can remove the plug and let the air out (by putting coolant here).
FYI if you ever want a temp gauge, it can go here