How does a Wikipedia article begin?

I was looking for information about when the search for 4-year-old Gus Lamont began after being reported missing on the 27th of September.
A Wikipedia article appeared at 9.43pm on the 8th of October.
This article was posted by - DiamondIIIXX, whos blurb states, I help Wikipedia improve.

When I inputted DiamondIIIXX into the Wiki search engine this message appeared, The page “DiamondIIIXX” does not exist.

Yet here is his “Homepage”
https://en.wikipedia.org/wiki/User:DiamondIIIXX

Anybody used to be able to change or create Wikipedia pages but I think that they have since put on some restrictions.

Does any one here ever send them money to keep Wikipedia viable?

I do. I give them $20 once a year.