The whole point of a trial instructional flight is to give the student an insight into the difficulty (or ease) of learning to fly. If you make it look like a space shuttle exercise from day one the student will be put off or stressed out before you even start. Flying from a basic point of view under guidance is simple, why make it sound so difficult. C152/172 or PA28 take-off proceedure; apply full power, point end of runway with rudder, when it feels like it wants to fly (insert speed if you like) gently use control to raise nose to horizon. Let them know you will be following their movements closely so that if they feel overwhelmed you can take over. If your trial student cant achieve that then they will be a 20+ hour solo student. Give the student a go at taxiing so they know how the rudder works and a play with the wheel and demonstrate acceptable movement prior to commencing roll. If you feel the student is not up to the task then scale down their involvement as necessary. Make sure they understand what "handing over"/"taking over" means before you start the engine.
Not so long ago where I started instructing the average hours for solo was somewhere just under 10 with some soloing at 6-8 hours. Basically you went from no experience to solo in that time, and that was before the advent of mass use of PC flight simulators by the beginners. I would guess since CASA mandated that Pipers and Cessnas were modified to be more difficult to fly the average hours must be around 15-20 for solo.