With 500 LEOM staked you can expect 4-5 LEO every 24h... But you'll receive the tokens and random hours. Give it a bit of time and you'll see the rewards coming nicely.
I'm receiving 1-2 LEO/hour. But I have 5K LEOM. In your case expect 1 LEO on average every 10h or so.
RE: Almost LEO/HIVE parity + Extra opportunity regarding the LEO ecosystem