/ic/ - Artwork/Critique

I need to structure out a plan on learning - I've reached the 250 box challenge on Drawabox and need to do some other stuff alongside it. There's a bunch of books and all the guides in the world, but I want to have a rigid plan in place that I can stick to (right now I'm just overwhelmed). Right now I don't want to be umming an ah-ing about what I should be looking at, and I want to be spending my learning time as efficiently as possible.

I think this guide from Nsio is nice and all, but it doesn't offer specific details. The guide in the sticky mentions a bunch of books immediately and only mentions Drawbox in Step 3, which seems crazy considering how it's starts off with absolute fundamentals.

Can someone offer me some constructive detailed advice on exactly what resources to study and exercises to practice? I know the common advise is just to practice and the content isn't that important, but I'm very keen to min-max it as much as possible. I have limited time and I want to know that I'm not grinding for little gain or enforcing bad habits.