Having done the course and become an approved tutor I would encourage you to do the online course, it is informative, teaching basic skills correctly very much health and safety oriented, the actual assessment was very daunting purely as we had no idea what to expect, it needn't have been only very basic turning skills need to be taught, the priorities need to be.
1. Health and safety (absolutely paramount) be prepared with all PPE for both you and your pupil.
2. Communication
3. Lesson Planning
4. Turning
If you follow the course and prepare the assessment will be no problem