Is it worth it to purchase the tst Emergency Course for the TOEFL ibt Test?

I started practicing toefl for two days now and my test is on the 16th (less than 6 days😭😭) and I’m a B2 level. Do you recommend studying from this course? If not, please share what you think it’s best and worth time. I’m literally freaking out because it’s my first time taking the toefl and I need to score no lower than 5/6 for my applications.