Well, even though tat method seems to be a little unnecessarily complicated, it should work just fine for what you were trying to accomplish.
In fact, it appears as though it did work, with one minor “gotcha” - since you deleted the domain, it was removed from DreamHost’s DNS records, and now that you have added it back (and the DNS records were created anew), you will have that “wait” for DNS to be updated.
Just be patient. It could take from a few hour, to up to several days (generally much less than that, though) for the DNS to be updated across the net so that you can *browse" to the domain again and see the WordPress stuff via a browser.
And, BTW, your English is fine. It is far better than most Americans’ facility with any language other than English! (and better than some Americans’ skill with English!)