ACT prep for current freshman

As the title says, I’m currently a freshman in highschool.
I plan to begin studying and prepping for the ACT all of summer.
What are some things I should do to prep for it considering I’ll only have a freshmans education? I’m willing to pay for courses, etc.

My daughter raised her ACT score 6 points by doing one-on-one tutoring. Where are you located?

I live in a small place, which doesn’t really have any ACT programs you can go to.

What classes are you currently taking (English, Math, Science)?