Where to I goto download pdf for watch manual?

This is a user to user only forum and you have posted your personal email address to potentially millions of users, which is most unwise. To protect you, I have asked the forum hosts to remove your email address.

Here is a link to the Apple Watch User Guide, which at the bottom has a PDF button, which opened just fine for me --> Apple Watch User Guide - Apple Support

Use this link https://help.apple.com/pdf/watch/9/en_US/apple-watch-user-guide-watchos9.pdf from the bottom of this Support Article Apple Watch User Guide.

Try here --> Apple - Support - Manuals

failing that, here are user guides:

Apple Watch User Guide - Apple Support