MDP,
I was in the same position that you are now five years ago.
I started work at a busy flying school and as a result the two other instructors were busy with their own ppl students, so I got most of the trial lessons, on the basis that any potential students were mine.
I thoroughly enjoyed trial lessons and learnt an awful lot - and learnt that there is an awful lot more to learn as well. Don't fall into the trap of believing that a CPL is the end of pilot training - it is only the begining.
The trial lesson is about the only part of the course where the instructor does a significant amount of poleing and it is were I really learnt how to fly AND captain an aircraft. More importantly, it is a great buzz giving someone the opportunity to do something they have always dreamed of.
I have been lucky enough to get my dream job as a commercial pilot, but only fly 250 hours a year. I would love to continue teaching trial lessons but alas I cannot even keep current on a Robbie, let alone teach on one.
Best of luck and enjoy it.