I only completed the first lesson (pg1 homework), so i can only give my feedback on those alone. But from what i seen your 8x lines are pretty good. You're pretty consistent on achieve that line structure, you made your first point nice and patient, flared at the other end but thats too be expected, on your curve ones they're pretty much the same but a bit more flared than the straight lines. Keep at it and you'll get better.

For your ghost lines (point a to point b) i would suggest slowing a bit down at the first point (not saying flow movements) but what im trying to say is get your first dot down then go, once your fine tip hits the paper just go, its okay to slow down on placing it on the first dot, but just go after that without hesistation. If you watch his video on his ghost line, he kind of slowly puts it on the first point but after that he just go's with it.

For your ghost planes, its pretty good. Some are over and some are under but over all its a nice flow especially for your circles inside them. I generally change the way i draw them (i either pull or push the pen away). I generally find pulling the pen towards me and my body easier and more consistent but that also hinders your movement. So i do both, pulling and pushing. Find the comfortable spot you can do either.