How to improve ACT score?

Hi everyone!
I’m currently a freshman at a community college in the midwest and I plan to retake my Act score since I want to improve it.
(I got a 24 ACT)
What are some good free resources I can utilize to improve my ACT score?
My ACT goal is 30. I would love to get a higher ACT score than a 30 but I don’t think that it’s possible for me…