I don't know how old the new-to-you wallpaper is, but I've found just pulling on older papers (30 years or so) takes it off. Then I just wash the walls repeatedly with warm water to get the glue softened and off. Sometimes (depending on the state of the plaster underneath) I use a wide, flexible scraper to get under the paper and glue.
I'm sure people have better ideas than I have for chemicals, but I must say any time I've used the "wallpaper ripper" tools, I've created more of a mess than I needed to.
GL!
-Ivy
Parenting two active, wonderful boys
This is your world. Shape it or someone else will. -Gary Lew