Your trip to Israel will start in the library next door or with your laptop on the chest, opening some hundred tabs with wikipedia content. Prepare yourself for a country founded only 1948 but a history going back thousands of years.
I saw a country under constant fire, cities full of bomb shelters and soldiers, with the capital Jerusalem being still a war zone. This trip challenged me and changed me, and those four weeks left the deepest and most controversial impressions. It's worth going there but don't expect havong an easy time on beaches and clubs. Take your time, study people's faces, prepare yourself well and take and get the experience of your lifetime!