How to swap between A & B version of a site

Hi:

I don't like having the changes I make to the website immediately visible. I would like to be able to have a non-production version(s) of my site where I can make changes and test them out extensively before publishing them.

My domain is in my google account.

Could I duplicate my site and make the updates to that.  Then when I'm done, disconnect the current production site (call it Version A) and then connect the duplicate version I just edited (Call it Version B) and then that becomes the live site?

Or

Is there a better way.

The first one, no. What you can do is move pages you are working on to the unlinked section of your site. This takes that page off the Nav bar or out of an index page. You can also disable a page while you work on it,  but you should still move it to the unlinked section first.