Simplify the following text for a Grade 10 native English-speaking person.
Original: He then set off with Katara and Aang on their journey to find a waterbending instructor at the North Pole , determined to hone his warrior skills by way of fighting a few Firebenders along the way .
Simplified: He then set off with Katara and Aang on their journey to find a waterbending master at the North Pole , determined to hone his warrior skills by way of fighting Firebenders along the way .