very late to posting it here, but my first ever shiny (though I've been playing Pokemon for a few years now) was actually this past April. It was a full 1/4096-odds shiny Cetoddle, as at the time I had not yet gotten the shiny charm. Now that I do, I have 7 shinies total, with varying levels of luck. (All of which I caught myself, as this doesn't include event/gift shinies.)
One of which (the Cetoddle) was full-odds,
three were 1/1365 (base odds with shiny charm, Iron Moth, Chansey, Sneasel.)
three were 1/820 (60+ outbreak pokemon defeated with shiny charm. Tatsugiri, Tarountula, Froslass),
(Fun fact, Chansey and Sneasel were both found accidentally while I was hunting for shinies in other outbreaks, Florges and Cryogonal respectively.)
the screenshot attached is of my first shiny right after I caught it.