I mainly have SAT Practice Test
No. You would waste a lot of time. Use real ACT tests.
I’d advise you to study with ACT material, so you get a feel of the questions, format etc.
The questions are much more straight-forward, so oftentimes answers that seem to easy to be true actually are the right answers.
If you study with ACT material, you can answer such a question in a few seconds and confidently move on.
It is best to use ACT tests for practice.
Here is one