@Finley Harrod hi mate, sorry for the very quick diagram. I'd start with some Footwork drills in the ladder, 2 feet in each section going forwards and then sideways. Then I'd move on to the 4 cones marked out. The coach (number 7) calls a random colour cone, the GK uses quick feet to go around the cone, back to the middle where the coach then serves the ball in for the catch. To make it more difficult, call more than 1 cone, or increase the speed the ball is served to get GK feet to set quicker