How important are EC's as a transfer student?

Are they necessary as a student who just wants to transfer to a state university? Should I be stressing over being active in clubs and stuff or just focus on my GPA? I’m feeling overwhelmed with my course load and EC’s as it is, and I’m actively looking for a job as well.

The most important thing is your GPA. If you are transferring to your state university which has an articulation agreement with the CC you attend now, then the number of ECs you have will not be a critical factor.