To be completely honest, I don't see anything wrong or incorrect with how you're approaching it. Yes, it does result in a rat's nest of lines, but that is an expected outcome of the technique, and while it is definitely a challenge to deal with, it's something students have steadily been getting more and more comfortable throughout the past lessons, starting from the plotted perspective in Lesson 1, to drawing through our forms in the box challenge and form intersections from Lesson 2, and throughout all of the constructional drawings from lessons 3-5 preceding this one. Of course, Lesson 6 marks a pretty significant jump in complexity in this regard, but again - it's intended, and expected. And as it stands, looking at your work, it seems to be something you can, with some additional focus and attention, deal with successfully.

The main thing students are missing at this point is control over proportional relationships across different dimensions. We have you start with a bounding box, but the specific proportions of that bounding box are still largely estimated, based on what we were developing with the cylinders in boxes from the cylinder challenge, which helps to refine those instincts.

That proportional control is something that comes in during Lesson 7. While we are not hesitant to saddle students with a lot all at once, we are still attentive to what we feel students can and can't take on at a given point, and so we leave the proportional stuff - like constructing a unit-sized 3D grid - to the last lesson.

Aside from that though, I'm not really seeing anything I would consider an issue - so if the big concern is just how time consuming and difficult those constructions are, that's entirely normal. Keep focusing on executing the work to the best of your current ability, allowing yourself to spread the work across as many sessions as you require, and you will continue getting as much as you can out of the exercises - which are of course all about following the prescribed process so that your brain is made to work through specific kinds of problems, which in turn rewires the way it engages with those problems subconsciously. The goal is not to create perfect/beautiful drawings right now - it's all about the process and what it does to our brains, and from what I can see you're doing just fine.