You're not going to fail. Nobody is going to ask you questions in an interview. Just get the extra feather in your cap.
If they did ask a question, you'd just tell them the truth and about your limited experience. Totally understandable to take advantage of the benefits you earned by serving our country and for that we thank you.
Too much smoke and shade in this room. Get off the conspiracy theories. He's just paying for training and bettering himself.