At the end of the day, it truly does not matter what the mission is. What your mission is. What our mission is. The only thing that will matter is if we have been true to ourselves while incarnated on this planet. Because our mission is simply to be true to ourselves.
At the end of it all, when we return back to source--to eternal life--afterlife, etc., it will be continual, yes. Or maybe it won't if you don't believe it. Does not matter. But it will not be the same as life here on Earth, as we are experiencing right now. Don't rush getting somewhere, don't try to speed up time, don't try to make any mission, your life. Your life IS your mission. All you have to do is create the way you wish to leave your mark here.
Don't allow any purpose of trying to fix humanity or shift humanity, or the need to prove you are 'good' or 'peaceful.' strip you from truly being one with all. If we truly are one, then we are all traveling in one same vessel--Mother Gaia is our vessel.
So don't hate the screaming kid on the plane who is simply just afraid because this might be his or her first time flying. Put in your earplugs and blindfold on for the ride. But if you see the screaming kid by themselves--may I suggest you offer to be of companion, as surely you remember what it is like to be afraid, and to need a hand to hold, or a voice that will tell us everything will be okay, even if it isn't going to be. After all, how would we know, if we never took off? Not everyone is ready yet.