Since “Divi Builder” is a commercial product and does not come from wordpress.org, you will not get detailed, “How To Use Divi Builder” responses here in these forums.
The best way to develop a site is to use Xampp, WAMP or whatever to run WordPress on your local machine and then later migrate your work to the live site…and there is more than one way to do any or all of that. However, you might have difficulty doing that with Divi Builder if its license only allows for a single installation.
As far as SEO is concerned, the issue there is to not change any URLs without adding proper redirects during site development if you even change any at all.
Here might be the best place to begin looking for some answers:
http://www.elegantthemes.com/gallery/divi/documentation/builder-overview-new/
Hi,
Thank you for getting back to me. I have set up MAMP.
Is there a way i can import the old site WordPress settings and layout?
Kind Regards,
The database contains theme settings and such along with site content (text and formatting), so bringing in the database as well as downloading the /wp-content/ folder should make it possible to clone the site and display it locally after editing the database to recognize and use the new (local) URL…and this might help with that:
https://wordpress.org/support/topic/copying-a-wordpress-site-into-localhost-for-testing?replies=3#post-7868664
You might be able to find a plugin or two that can export/import only the theme settings from one database (site) to another, but I do not have any actual experience there.