For Lang Paper 1 - the one with the picture that you posted (old man), he can pre prepare some 'scenes'. Get him to work with you on this:
Scene 1: an old man on a bench. What does he look like - describe his face, his hands, his clothes, his shoes. Use one simile, one metaphor and/or one form of personification. Now describe an expression on his face (sadness is easier than happiness!)
Scene 2: the old man sees a jogger running past. Describe the jogger - old or young, clothes, hair. Do they plod or speed past? Describe the jogger as an animal of some kind.
Scene 3: as the jogger disappears, a photographer takes a picture of them. As they look through the lens, describe the scene in the camera lens, and move from the jogger to the old man (this links it all together).
In the exam, he then has to link this to the picture somehow - if he gets a photo of an old man, great, start straight in. If he gets a busy street, one line about the busy street, then 'in a quiet corner, an old man watched the busy street from a rickety bench'. If it's a boat on a stormy sea, the old man remembers his days as a fisherman in scene 1. If a hillside path, a bird could swoop over that, then travel further and see the old man... etc
He can memorise scenes 1-3, then all he has to do is write a (tenuous) link to the picture.
This is what we teach y11 to do, and we get solid results and positive comments from examiners.
He has time as AQA lang is after half term. Good luck!