Corel provides an overview of WP Suite 8 on its Features and Highlights Web pages. Official manuals are included on the CD-ROM and can be read using the Envoy viewer. See the How to's and Help pages on this site for tips and tricks and listings of other sources for WP information and help.
Books are always excellent sources for learning a product inside and out.
Osborne McGraw-Hill, 1998. IDG Books Worldwide. WordPerfect 8 for Windows 95 for Dummies. More books are listed at the Caledonia Network Consulting website and at Brian Dostal's website . Corel's Web site is a good place to start.