How to improve a low ACT score?

I haven’t studied for it because I’ve been so busy with school, but I’ve taken it twice. The first time I got a composite score of 19 and the second time I got a composite score of 19, but the second time my scores improved.

1st time: 2nd:
Reading: 18. 24.
English: 22. 19.
Math: 19. 15.
Science: 17. 18.
Writing: 8/12. 9/12
I struggle to manage time and oftentimes the math can be complicated. I want a score of 30 and I know it is possible if I study but I just don’t know how to stick to it, be efficient, and learn to manage time. Help?

In the English section there are 75 question, 5 passages, and 45 mins to complete. There are 15 questions per passage so if you did the math you would have 9 mins to do each passage. So if you start timing yourself per passage, you would get the idea of the pace that you would have to go at to complete each section. You have 1 min per math question, 8:45 per reading passage, and 5-6 min per science passage.