It will help you just to get used to hearing Hebrew spoken and to following along in the text. I have not personally evaluated this software. However, I have heard from several students that it is very good and basically covers the first semester. You will, obviously, be expected to use the language throughout your academic program. The first couple of days in particular are crucial as we lay the foundation for the rest of the summer in the first few sessions.
Language learning is cumulative.
We also have daily quizzes that count toward your grade. It will only make an already challenging course more difficult if you miss classes. I have studied Hebrew before. They may require you to take a placement exam. I try to stay out of these administrative loops and stick just to teaching Hebrew.