Is there a guide or instruction book for new iPad Pro 11?

You would use the Books app and search the book store.

search for iPad 11 user guide. The Apple document will be free.

It is called iPad User Guide, for iPadOS14.5

You can download the Apple iPad User's Guide here.

Tap the link below.

https://books.apple.com/us/book/ipad-user-guide/id1515995498

AND

Also Apple's iPad/iPad YouTube video library here

Tap the link below.

https://youtube.com/playlist?list=PLIl2EzNYri0crmY28ZNs-bsgzGOms2nAn

Best of Luck to You!