Ok, a few things stand out to me that might have made your brew too dark.
First, I would have used extra light extract rather than golden.
Second, I would have added the extract waaaaay late in the brewing process, like the last 15 mins. When you cook sugar it caramelizes and gets darker.
Third, you need to have an actual Mexican piss in it to get even close to Corona.
(hey, you brought it up!)
On a separate note, I've always heard that Centennial are the hops to use for Corona clones...