Martha,
It's really not that hard, you just need to get the hang of it. Just remember to always find the repeat in the pattern, order extra because you go through a lot of wallpaper matching the repeat and if you do need to order more save the label on the original roll so you can get the same dye lot. YOU CAN DO IT!
This is the area I just finished last week, it took a full two rolls of paper. It is where my Jay Strongwater collection goes.