Sort what you already have
Start with the results from earlier lessons: product shots of the can, the surfer character, different poses and angles. Group them into Product, Character and Environment. That turns a loose gallery into a set of parts you can combine.
Build the key visual
Take your strongest product shot, add the character and pick a setting. Combine them into one composition in your design tool. This key visual sets the look of the whole campaign. You're not starting from scratch: the product and the character already exist, and now they get a purpose.
Adapt it for a social post
For a 1:1 or 4:5 post, keep the product large and put the character second. The character adds energy and context, and the product stays the hero. A short line like CHASE THE WAVE is enough copy.
Rework it for a vertical story
Rearrange it for a website hero
For a wide 16:9 banner, place the character on one side and the can on the other, and leave space for a headline and a button. It's the same set of assets in a new layout, not a new scene.
Keep the campaign consistent
Put the post, the story and the hero side by side. The crop and the layout change, but the product, the character and the visual direction stay the same. That consistency makes a set of generations look like one campaign instead of a folder of unrelated results.