Glad you are considering your trip by train! Much of anyone's train travel is based on how each individual experiences any event in life. That being said each family member will have a varied opinion as will each individual who responds to you here. Go with an open mind and be flexible and coach is doable, did it with my kids, they did it with their kids. Of course most that will respond here are rail fans, we tend to have predetermined expectations on how we hope our trips go so at times you may hear things that may not be totally encouraging and some things that are great. I believe most responding though will agree, most any day on the train is better than being in the station watching it go by! Don't hesitate to ask more questions or more details there's not much that can't be discovered here, especially about train travel. It IS possible, but not easy for a 1st timer, to book a small portion of your trip in sleeper say 6 or 8 hours and remainder in coach. It's just not convenient, getting off coach on to sleeper and vice versa if you go back to coach later in the trip