My Sonata won't start. The lights work and the radio works but it won't turn over. Any suggestions? I don't know if I should try and jump it or not.

It's best not to jump a modern-day vehicle. It increases the risk that a voltage spike will destroy the ECM, alternator, or sensors. The best thing to do is to remove and fully charge/replace the battery. AutoZone and most auto parts stores will charge batteries for free. When you remove the battery, be sure to clean the battery terminals and cable connections. Remove the negative battery cable first, connect it last.