replaced timing belt. turn over no start. how do I know if valves need replaced on 2003 Dodge Neon

was driving on freeway, timing belt broke, got off 1st exit, pushed on gas pedal but it stayed at an idle. turned off engine and towed it home. replaced timing belt correctly and now it will turn over but wont start. someone told me it may be an engine valve got damaged. how do I find out? or do you have any info regarding my problem that you can share or advise?

Asked by for the 2003 Dodge Neon