Check your manual. On the Sonata the first change is at 3000 and then every 5000 or 7500 depending on driving style.
I always do the first change on a new car at 1000 and then when the factory calls for it. So on my car last year it was 1000 - 3000 -8000 and every 5000 there after. I like to get the factory oil and hopefully any new engine assembly debris out asap. But everyone has their own ways.