And you're doing just fine.
I just wanted to clarify that point because there
are times when you press enter, other times when you press Alter, times when you press F2 or F3, and all of them behave differently. It's frustrating and we've had people on here take directions from a post, go out to their machine, then not get things to work. I'm not nearly as experienced as you might think, though.
The best thing you can do to learn is jump in on these threads and do what you're doing. Much of what I've learned was through this forum.
As for the manuals, I actually prefer the lathe manual to the mill manual (well, at least the one from two years ago). I've learned more about the control from the Lathe manual, which I cross reference to the Mill manual and find the feature either not documented, or poorly documented.