Complex sentence: Paula starts off as a friend of Violetta but mid season one over a few episodes comes to realize how nasty and shallow Violetta is and joins Mia and finally learns about Centopia in the final two part episode (episode 25 and 26).
Split into simpler sentences: Paula starts off as a friend of Violetta but over time comes to realize how nasty and shallow Violetta is and joins Mia. She learns about Centopia in the final two part episode (Episode 25 and 26).