What is the best Online course offered on ACT Prep? Do I really need one to start the ACT?

Also what is the best ACT Prep Guidebook I can find ?

The best way to study for the ACT is to practice with REAL ACT tests. There are 5 tests in the Red ACT Book, 3rd Edition. ACT released several tests in booklet form.

Time each practice session to simulate the real test.

English 75 questions in 45 min.
Math 60 questions in 60 min.
Reading 40 questions in 35 min.
Science 40 questions in 35 min

Score your test, and then review only what you got wrong after each practice session.

I suggest the following schedule:

Take 1 section each school night/with review for 4 nights/week.
Twice per month on a Saturday or Sunday take a full ACT test/with review.

You may also find this website helpful, if you are just beginning your prep.
https://www.varsitytutors.com/

Thanks for the help @HereToHelpYou ! Also what about those online courses? which one you think is best? Do

a. Grockit https://grockit.com/act/info/

b. Kaplan’s http://www.kaptest.com/act

c. TestMasters http://www.testmasters.net/

d. PrepCourse https://www.prepscholar.com/act/s/

@Orientalist I’m a founder at PrepScholar (choice D) and I’m happy to answer any questions you have!