Please just don't think about all of this until maybe a month before your trip. You have been posting incoherent ramblings all over the place, and it does not look like you have listened to any advice given to you.
You cannot checkin through Expedia, they are just a booking/travel agent. You checkin direct with the airline.
Would have been advisable you booked direct with the airlines also, almost certainly price would have been the same, and if you needed to change anything it is much easier. Good luck if you need to make any changes now, as you will need to go through Expedia.
I actually doubt (if all your posts are legitimate) that you will make it all the way to your destination.
PS: You will be on a SkyBe aircraft. It will just be a Finnair codeshare (carry an AYxxxx number), but Skybe plane.
Also i was told in this forum that you might or might not get all airline boarding pass when check online from home. So what i reckon is if i only end up just with 1 boarding pass lets say qantas only. Then i can still get all the boarding pass manually by going to finnair website and check in online there as well moments later. At least i have all boarding pass complete. Anyjow this is really new for me but i like to see what happens then. Its exciting to know. And see how technology like the revoled.
Its really not a big issue but still can be as i don't want to go all voer one place to another at airports just to get a boarding pass ticket.. knowing there is a huge line up with passangers and i am in a rush to get to and from terminals because im runing late or because i only have a very short period of time before departing gates are close. Anyways i think i should be fine. Im only just excited as much as you are with your own trips that you plan on going overseas.
Have you buy expedia tickets before ?
Perhaps the travel agencies may of of old thing know days and people just buy airline tickets more and more online from home. Thats technology.