Don’t just do this for the interview.

But one of the best way to learn and understand, in conjunction with the guide, is to get some Jepp charts to places you fly with the FAA charts. Look at both and compare the differences. Then get the DFW Jepp charts and compare them to the FAA charts. They usually use DFW charts for the interview. Look at the STARs and SIDs and understand them and the notes, etc.

I would also start using Jepp charts. A small investment compared to what you have already dropped. It will help your transition to commercial and 121 or 135 flying easier, no matter where you end up going.