A popular misconception is that you must know Hebrew or have a translator if you plan on traveling through Israel. It’s actually quite the opposite! You will find that most, if not all, Israelis speak English. As a student, everyone on campus will likely speak English fluently so there won’t be a barrier of communication.
Regardless, if you are planning on spending a semester or extended period of time studying in Israel, it would be a shame to leave not knowing any of the local language. Speaking in a foreign tongue unlocks numerous cultural nuances that you can't simply understand from an English-speaking perspective. Choose a program with a language course or opt to hire a private tutor. Even having a few basic phrases under your belt will make a huge difference!
Locals can typically tell if you don’t live there and will speak to you in English. If someone does speak to you in Hebrew, politely let them know that you don’t speak the language and they will gladly speak to you in English. Don’t worry, it’s not disrespectful.