Need some good advise here

There is a sticky under forum technical support that shows how to post a picture. I assume the bubble is under the passenger window not above or on the side? How large is it? 1 ft in dia? When you push on the interior wall is it soft or just the wall paper wrinkled? Start by coin tapping the outside and inside walls to see how much damage is underneath. A disbonded area would have a thud sound and a good bonded area would have more of a ring to it. From your description the window will have to be removed to seal it properly with butyl tape and allow the area underneath to dry. Once removed you can look inside the skin and see what the damage is.