This is a pro schedule. Read most of it going, "Yup. That's right, and then you.. Ok, perfect. Good plan."

There are two things I would say: First thing (and this is much smaller), I'm 27 and I would find 8-3pm physically demanding. Even adding an extra hour of rest would go a long way. The most important part of cutting your day into two parts is that you want to avoid the heavy afternoon sun.

The second thing (which is far more important) is this: Disney World is AMAZING, but the Magic Kingdom is still the best part. Since it's your first time going, I worry that you might get to the end of your trip and wish you had mirrored the whole thing. You might very well end up deciding that a second day in Magic Kingdom is more important than a day at Hollywood Studios. There's just more to do there than anywhere else, and it has a wonderful ambiance that makes it the, well, most magical part of Disney World.

Just a thought. But really those are the biggest things that jump out at me.