I am uncertain if this has already been covered, but…

I have taken over a website that employs the Astra theme on Elementor Free. http://www.heraldic-arts.com.

The client has decided they wish to use the Jevelin theme, which has been bought, along with WPBakery.

I am by no means a WordPress genius, but before I simply click the button to change the theme, I assume that there must be some “prep work” done so that everything doesn’t get lost in the process, or horribly mangled.

If there is any sort of guide for this, please do me the favor of directing me there.

Thanks!