Obsidian publish and custom domain with cloudflare

Hi,

I have an obsidian publish website.
I have a custom domain hosted by ovh.
On my custom domain, I have a wordpress website.

I want to replace my WordPress with my Obsidian Publish.
And I want to keep my wordpress just in case. I dont want to delete it.
I would like to be able to switch obsidian publish / wordpress, but it’s optionnal.

I read the Custom domains - Obsidian Help
but I don’t really understand what I have to do…

I understood I have to create a free cloudflare acount (right ?), but after, I don’t know.

Any help would be really appreciated !

Thank you so much in advance.

Best regards,

Benjamin