Panel 2: I gotta say, I hate it when anyone does that. It's not just that it's Elly, nagging. It's what I said to someone who was training me on a job: "I know why you tell me all this, but please don't stop me in the act of correcting myself. I need to build up the muscle memory, and I need to create my own cues, not have someone else give them." She didn't know what I was talking about, so I said, "Just let me do the whole thing a couple times."
Similarly, April should be able to remember the parking brake on her own. She probably had her hand already on it when Elly said that. If she really doesn't remember, and heads down the road with it still on, then Elly can speak up. But "Don't forget" is annoying and unnecessary.
Panel 3: I wonder if this is supposed to be April's first time behind the wheel. In which case, Elly walking her through it is understandable. Of course, that completely contradicts the letters. Has there ever been an instance of that? Not just details being changed between strip and letters, or an event taking place only in the letters, but a total discrepancy -- "I've got my license!" -- "She just got her permit"?
Panel 4: Still, this instruction is pure Elly. "Don't go into the middle of the road! Don't stick a bead up your nose! Don't forget to eat!" And "OK, OK, OK!!!" is what April should be saying. Also, the placement of the talk balloon makes it look like the car fell out of the garage.
Panel 5: Well, to be fair, she's not checking; she has deer-in-headlights eyes. Still, jeez.
Panel 6: Oh, at this point, I would be pulling over and stating that one or the other of us would have to get out. And it's hard to tell, at first glance, if the car is approaching the stop sign, or has already passed it.
Panel 7: April has nerves of steel, that's all I can say. Elly looks as if April was landing an F-14 on an aircraft carrier at night and during a storm.
Panel 8: Elly, she's not tailgating. STFU already.
Panel 9: Like the courtesy of getting off the driver's case? And we have the Patterson Finger of Righteousness.
Panel 10: Okay. First of all, let me say that April looks hot. I think it's because the droopy eyes compliment the lips, instead of making them look freakish the way the big liquid eyes do. Second, I do believe this is the first unambiguously pro-April punchline in a long time. I can't see this reading any way except Elly being annoying and April having a right to be annoyed. Don't know why the steering wheel is so far away and at an angle, though.