Once the plugin is enabled, you're ready to create games. It extends eventing, adding more features to eventing so it's extremely easy if you're familiar with RPG Maker or used to eventing or have created a game before, but it's quite difficult if you're new to RPG Maker or not yet good at it. Below here is a screenshot of how I create a spell called Tornado, which create 4 tornadoes near the player.
Basically, if I press a button, I'll change graphic of player to casting animation then create 4 tornadoes from a template map to player's position. For tornado, they'll play animation tornado and basically just move randomly on map till they collide enemies. If you find that easy to understand then congratulation, this plugin will be easy for you.