Creating a staging site

Hi all

With a new version of Premiumpress coming, the time will soon again come to update my site. I used to do this on the live site, but this has now become a bit too valuable to mess around with.

Therefore I want to create a staging site to test the updates first before deploying them to my live site (shoppingdeals4u.com).
I have found many posts and articles about ways to do this but I was wondering if there was a preferred method to do it with the Premiumpress themes? I use the responsive coupon theme with a child theme.

So essentially I want a test site that’s a copy of my site where I can test the updates before applying to the actual site. I have not created something like this before, so hopefully it isn’t too hard to do.

Thanks
Jasper