This will help to choose the right seams.

Do not rush to start gluing wallpaper. It is better to measure seven times and cut off once. If there are windows on the wall, start glue from them. This will help to choose the right seams. When everything is marked, you can begin to smear wallpaper with glue. This should be done carefully, after putting a newspaper or oilcloth on the floor. Particular attention should be paid to the choice of glue and its preparation. When working with glue, it is advisable to use medical gloves. Preparing the glue, you need to thoroughly stir it to avoid the appearance of lumps.