Yep, that's fine, give it a little rest time now, and watch for those veins to disappear. It's pulling in all the blood from around the egg, but now you can monitor it. They won't totally disappear, some residue will be left in the blood vessels, and actually that's what it looks like to me now, but hard to be sure from a pic.
And yes, there is an inner and outer membrane. One hooked to the shell and one encompassing the baby. The air cell is between to two.
At this point, I'd let it rest about an hour, then try to widen the hole around the beak just a little. Keep an eye on it and make sure it never tucks its beak back under the membrane. The beak needs to stay free to the air.