So by "draw through your ellipses", I'm referring to this from Lesson 1 (I assume you do understand that, but I wanted to be clear just in case).

Every time I let it go twice without thinking it through and being slow

Remember that as discussed back in Lesson 1 - specifically in the principles of markmaking, our primary goal is not accuracy - it is confidence. Even while it may undermine the accuracy of our strokes, we must execute those marks with a confident pace (ie: not slowly, albeit not necessarily fast, but rather at whatever pace we need to ensure that we do not attempt to steer the pen with our eyes in order to correct mistakes while drawing). The moment your pen touches the page, you must commit to whatever trajectory you were set upon (assuming use of the planning and preparation phases of the ghosting method beforehand, which as mentioned in my original critique is necessary here). If you end up struggling with accuracy, that's fine - but the solution is not to change the approach, but simply to keep practicing that markmaking. Through however many iterations of those Lesson 1 exercises one would have reasonably done by this point as part of their warmups since completing Lesson 1, our accuracy would steadily improve, but only if we actually apply the approach as instructed, prioritizing the right parts.

I'm not sure how to be more confident

I do sometimes run into students who are just convinced that they cannot draw with confidence, and this can pose a pretty big wall. The solution in my experience is to show them that they can.

So, here's what you do. Take a piece of paper, put it on your desk. Make sure you're sitting comfortably - meaning, the chair/table height relationship should be such that you can place your hands flat on the tabletop while bending your elbows at a 90 degree angle. If you can't, you're either sitting too high or too low relative to the table. Being a little high is not a problem, but being higher than that, or low at all will mess with the use of your arm.

Sitting comfortably, take your pen and strike across the page with it as quickly as you can, using your whole arm from the shoulder. Don't worry about what mark you intend to make in this case - just draw as quickly as you can.

Your marks won't necessarily be straight, but they will be smooth. It is physically impossible, if you're really focusing on a smooth, blazingly fast execution, to end up with any wobbles in the stroke, because there's no time for it. The stroke pushes through, and out comes a smooth. non-specific, unplanned stroke.

That's proof that you can draw with confidence. The challenge is not to keep the marks smooth - it's to build up accuracy around that.