As a fan of military tech (and also being prior service myself) I have to admit I wish I had gone straight into the military when I was 18 and still young. I had a friend in high school who had a civilian pilot's license and was ordered to fly for Spain during the first gulf war. He was depressed over the thought of being called in to fly jets in a war zone but he never did. Potential danger aside, I believe he was rated to fly a Mirage jet, which I thought was very cool.
Without getting too political, you will have an important job to do, but take comfort in the fact that your country has developed a lot of advanced technology needed for its own survival. You have the Merkava, Rafael's Trophy system (which has advanced greatly since inception) the Tavor (Tav-21) and even some strange things like the Cornershot (developed by a civilian I believe). Chances are you'll be issued an M16A2, possibly an M4, but I found both to be outstanding weapons.
Yes, it's all fun and games until you go to war, but war may never come for you. And judging from online photographs, there are a TON of hot, young men and women in compulsory service in the IDF. Whoever you are in real life, know that complete strangers are wishing you a long, happy life.