On a trial flight, or even Effects of Controls in the hover, the first control to master is the pedals alone. If you cannot make it point at something and keep it there, you will never be able to hover.
Then they get collective alone. Work out how small a movement is needed to change, or hold, a height.
If the student is doing well on this, give them both, but ensure that the first thing they think about is MAKE IT POINT.
Bloggs will lose it many times and you will recover it.
Then the cyclic is demonstrated, using the tip of one finger to control the hover. Make sure Bloggs is looking outside, not at the cyclic. Stress how important it is to keep the picture FLAT and held at a particular spot in the windscreen. If it moves, fix it. Doesn't matter if he drifts while fixing it, the important item to learn here is not ground position, but ATTITUDE CONTROL.
When Bloggs is on all 3, the mantra is MAKE IT POINT! KEEP IT FLAT! Then fix the height.
Back in 1993, I was fortunate enough to be asked to take a rather well-known movie star for a lesson. He already held fixed-wing qualifications and owned his own warbird and jet. The upper air work was easy, as the chopper behaves like an airplane in forward flight. The fun began when we came back down for some hovering. He was getting better at the attitude control, but wasn't a Top Gun on his first go.
Subsequently he got his full licence and did his own chopper stunts in his films.