I'm getting all stirred up, which has caused me to wake up (figuratively). I'm rousing myself to tackle this challenge!

奮起 is a formal word for rousing someone or oneself to action in challenging situations. It describes a moment when someone decides to gather their strength and face a task or problem head-on.

This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.