Divorcing a narcissistic husband

We've been married 2 years. Dated for 6 got pregnant and both sets of parents rushed us to get married. My husband has been at basic for 3 months. It's been nice not to be emotionally abused. I want a divorce. I'm not happy with him. How do I even start that conversation? I'm scared. He's still at basic but he gets to FaceTime me this weekend. I want a divorce and I feel bad about it but I want control of my life again and I want the best for our son.