@BenH101 if you are starting off with youth games, remember to take in to consideration their age: the younger they are the less strength they have and therefore the drop zone for the ball is likely to be on their side of the goal. For U11's, I've positioned myself off the FOP at the edge of the six yard box when needed, to get the best view. Likewise for goal kicks, the younger they are the closer you will need to be to the keeper taking the kick. But also importantly, take a mental note of the player/GK and their strengths when they take corners/goal-kicks, and you can update your position accordingly on later kicks.