If you can get to it, give the starter motor a few taps with a rubber or plastic hammer, ( a normal hamer will do but not belting great blows but enough to unstick it)
or pop her in gear, and rock her vigourously back an fourth a few times,
Starter motors on their way out get stuck, the above gets them unstuck occasionally, if that dont work the starter needs replacing, I would suggest the starter solenoid is the click you can hear,
I am confused by the comment the engine turns over, do you mean it will run when you bump start it or is it turning over on the starter & not firing?? as thats a different problem all together