Hello Andrea and congratulations on your engagement and upcoming wedding!
We don't have any kids yet, so I'm afraid I can't help you with that part. But as the other girls have said, the time during training is indeed tough. I can imagine that it will be that little bit harder to be apart if you are newly engaged (been there, done that! my DH was away for two months after we got engaged). But it's all worth it in the end! Like Amanda says, you have a wedding to plan now as well as look after your 3yo daughter, so I'm sure you'll be kept more than busy whilst he is gone!