Most likely scenario is that your incoming flight from Paris will arrive T1A and your Amman flight will leave T1B.

It can be a bit of a walk depending on which gate you dock at/depart from.

The Golden Rule at FRA is "follow the signs" - as you emerge from the airbridge from your Paris flight, there should even be an indicator on the screen up above you telling you which way to turn and which number gate to go to.

There is also a Guide to connecting at FRA thread on the Lufthansa forum which you might find useful to refer to.