I consider myself to be an “early assister” but only because I have hatched quite a bit and have lost a lot of babies by waiting too long. Since you’ll be out and about today though, I would wait until you are home and settled and then consider assisting if the chick still hasn’t made any progress.
If it does come to that point, I would remove the two hatched chicks and put them in the brooder. Then pull out the egg and use tweezers to gently take off little pieces of shell around the area that the chick has pipped. At that point if the membrane around the chick is looking white then it is likely stuck. Just continue taking off little pieces of shell around the air cell. Moisten the membrane around the chick and make sure there are no large blood veins. If the chick is still making a lot of “chewing” motions then it is still absorbing the yolk.
But basically what I usually do is take off all the shell where the air cell was, if there aren’t large blood vessels in the moistened membrane I will gently open the membrane and let the chicks head and shoulders be exposed, then place the egg back in the incubator.
Usually they will hatch on their own within the next 20 mins. If they haven’t done much after about an hour I will assist some more to free a bit more of the chick. But never pull the chick out of the bottom of the egg, let them do that when they are ready. Fingers crossed the chick will just hatch on her own today, but if not, you’ve got this!
Still waiting on #6 in the strange position. Now I don’t want to go to bed lol.
Our kids just keep screeching and even crying because they just can’t handle the cuteness overload. 
