There's a boat waiting for you on the beach down the path to the southeast. You'll need a hammer to repair it, which you can probably find in a Dvergar Raider's camp near the beach.
* Each time you use the Firebolt ability (a 'Charge Ability') you will generate Magic charges.
* You then use those Magic charges to power 'Execute Abilities' such as the Pyro Blast ability (press '4' to use it).
Welcome to Corsica! Glad to see you've made it.