I'm currently writing a small essay for my English class and I'd like to know if this sentence would work as an idiom of improbability
You could never tell me the odds when I noticed that this small coffee shop had a "Now Hiring" sign just outside their window.
I'm trying to find an idiom to express the astonishment I had when I realised a very improbable event. (For context I was looking for a job, I went in a small coffee shop to look for offers on my phone when I realised that said coffee shop was currently hiring, and subsequently got hired.)
I tried to look up if "never tell me the odds" was a common saying, but it doesn't seem like anyone outside of the Star Wars and Reddit universe uses it regularly.