The best way to learn how to hang wallpaper is to work with someone who is a professional. The video will help with all the basics but like all trades there are many tricks.You can do it yourself but the first couple times it will turn out not to good. There is more to it than people think. Us pro's who do it every day make it look easier than it really is.
The one thing that makes wallpapering difficult is you are dealling with something that will be a finish product. You cant cover mistakes. It is not like painting were you can fix mistakes. A bad paper job is odvious.
Get the video, I also have a book on my site you can down load and read on your computer, Find some one who already knows how and paper an easy room on your first try. Kitchens and baths may be small but they are the hardest.
Hope all this helps.