no... goto file> document setup> ... click more options... add bleed...
Set the dimensions to what the book will be trimmed to.
In the Bleed settings insert the Bleed amount required. This produces a red guide on the outside of all pages.
Any item requiring bleed must extend out to this line or beyond it.
When you export to PDF make sure to use the Document Bleed settings in "Marks and Bleed" area.
InDesign is a pretty complex application to learn on your own.
As soon as possible, acquire a good book on InDesign. My recommendation for beginners is Sandee Cohen's "InDesign QuickStart Guide." There are editions for different versions for InDesign. Less than $20.