Get your first bullseye
A bulls-eye is obtained when you cast into the center of the target. If the target says 75, then when casting try to get the slider around three quarters of the way down. Of course adjust this amount if the target says more or less. Make sure when you are pulling back up to be as straight as possible. You can make this a lot easier if you equip the "Target Magnet" lure, as this will hone in on the center, making this task a breeze.