Same ward
I agree he needs to be told some things, but I do worry about him. He's only eleven, and it's a lot to take on board. We don't want to overwhelm by dictating his every move.
First things first, Harry the elder is going to need to write down what happens in his time - the important things, anyway - and then figure out what needs to stay and what needs to go. Harry, if you don't want to talk to us about the future, maybe you can talk to your friends in the other time to get a second opinion on what's important and what's not.