Sounds like a good program G-string!
It has been a while ago when I had my first day as an instructor, and I don't know if this will help you, but I did sort of the same thing.
With my first instructing job my first flight was in a PA Archer, and the only planes I had flown so far were Cessnas. While the student was waiting in the sun to get on the airplane, I was reading the Airplane manual. Looking back I had more trouble finding my way back to the airport than teaching the student how to fly the airplane.
About the experience, I would just tell about your (in)experience if they asked! Otherwise don't mention it. (Most student will be able to notice it anyway.)
Also look at it this way: There are both pro's and con's about new/fresh instructors.
- Pro: You just had the exams/training, so you should have a high standard and a fresh memory of all the theory and rules etc.
- Con: You don't/ might not have that much experience with interacting with students.
The Post PPL checkouts will be pretty easy I guess, since the students will basically fly the same way as you have been taught.
The senior pilot checkout might be a little bit more tricky. He might try to bluff his way through the checkout.
Just stick to your program, it looks good. If the pilots perform to a standard that you think is safe, sign the logbooks and you're done. Otherwise, don't hesitate to let them come back for another refresher lesson.
Just make sure they are safe operating the airplane, it's your license that's at risk and their lives.
I hope this helped you out a little bit.
Good luck, have fun,
BC