You can also see the annotation from the recording. Open the Orbier/Flights directory and look for the folder that has the same name as the scenario, "DG to the Moon" or whatever. THere will be a bunch of files, for each vessel there is an .atc file, an .att file and a .pos lile. Find the .atc file for the vessel that is active when the scenario starts (probably GL-01 in this case) and open the .atc file in any text editor - notepad works fine. In this file will be lines that start with a sim time, then "NOTE". what comes after "NOTE" is what gets displayed during the flight. It's a bit cluttered, but you can ingnore everything but the NOTE lines and read all the text.
One of the ways to lessen the slope of the learning curve is to learn different fligh stages seperately. First get competent at one thing at a time. You can start by learning how to get into orbit, and focus on that until you get decent. Then practice plane changes, and once you have that down try either rendesvous/docking or lunar transfer.
Most tutorials are targeted to a particular skill level. The tutorial that teaches you how to make your first lunar transfer won't likely be the one that teaches you how to optimize the transfer or perform a free-return trajectory.
Most tutorials also expect a minimum skill level. Most Lunar Transfer tutorials expect that you have some competency in launching into orbit, and LEO operations such as aligning planes and managing your Apo and Pe.
Lastly, having an excess of thrust doesn't make a transfer easier, in fact it can make things much more difficult. If you use for Delta Velocity than is needed you'll get there quicker, but it's no easier to plan and execute the ejection burn. Once yo get there you will need to lose a lot more velocity to be captured into orbit at the target, so it's more difficult to time the burn.
The reason that Orbiter has such a steep learning curve is because in order to be good with Orbiter you have to develop an understanding of the physics of Orbital Mechanics. You don't need to able to do the math, but you need to have a general idea of what the terms and numbers mean. This understanding will come in time and with practice. There are many tutorials out there, try as many as you can. Don't just check out one "Earth to Moon" tutorial, check out a bunch. Most tutorials are fairly specific to the exact mission as the tutorial and may not work for a different day or target. If you try a few of them you'll start to get a "feel" for what's the same in each, what's different in each, and eventually understand the basic theory - and how to adapt it to the current situation.
This understanding won't come all at once, but bits of it will come together individually. You'll have lots of "eureka" moments. Then the bits start to come together and you start to see a bigger picture, etc. Checking out many different tutorials, and reading threads here, will speed the process, but it's almost impossible for someone to give you this understanding. We can paint you the picture, but can't make you interperate it correctly. That's just something yuo have to get for yourself.
It's hard at first, so don't give up over a few failures. If you don't get a tutorial, set it aside and try another. Eventually you should come back to that tutorial and try it again - unles you've learned that the first tutorial wasn't very good! Start with tutorials that come highly recommended, such as "Go Play in Space" (which I beleive covers the DG to the Moon flight tutorial that comes with Orbiter. as well as some others such as "Smack Rescue"). It's a bit heady for beginners, but there are a few tutorials out there that are so poorly done that they could hurt more than help.
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