My suggestion, fwiw, is to look at the section headings in the recommended books thread and consider which ones will be most practical and beneficial for you personally.
For example, if you have little or no means to change your diet at present, reading the technical nutrition books isn't going to help, practically, until you get out of that situation. It would be sufficient, in the mean time, to get a broad understanding just by reading the referenced threads in the footnotes. Similarly, if dealing with people is a very major issue (again, for you at present), then you'll find the cognitive science and especially the narcissism books indispensable.
I'd also recommend, from my experience, to read in two or three areas at a time, because reading books from start to finish sequentially can be much more tedious, and it kind of becomes reading for the sake of just "getting through the material". Watch out for that. G says: "First it is necessary to understand." Mixing topics you're more familiar with and others not so much in this way also seems to help.
As to which books first exactly, that you'll have to figure out yourself based on your self-observations and specific recommendations and comments from other forum members. Again, the footnotes in the book list thread, and the threads linked, is your best starting (continuing) place imo.
This is by no means a comprehensive guide, it's really what comes to mind for me since I'm dealing with trying to soak up "the basics" in the most efficient way I can. But perhaps it can be fleshed out by others so that readers that have a lot to get through (which includes some of us that have already covered a significant amount) can organize our knowledge building more practically, thus speeding up progress and lessening the potential despair of the overwhelming and increasing volume of material collected.