In case you’ve misplaced your scoop, here’s a replacement.
The AeroPress scoop holds 11.5 grams of ground coffee in a level scoop and around 14 grams of ground coffee in a heaped scoop.
How much coffee you use in a pressing will depend on your taste, the amount of water you are using, the grind level and the type of filter. To get your bearings, start with a heaped scoop of finely ground coffee and fill the AeroPress chamber up to the first mark. Vary things from there based on how much you liked the brew.