Hey and welcome to the 人間失格 home thread!
I would like to start trying to set up a reading schedule, but this book does not seem to be very friendly when it comes to being sliced into digestible portions :-/
Looking at the page count on Amazon (192 pages), it sounds like we could have a 12-week schedule maybe? That would technically mean 16 pages per week, but usually there are a few unrelated pages at the front and back, so we might end up with 15 pages.
Regarding the breakup of the book into those weeks, here are some findings I could derive from the eBook version. The book’s structure looks like like this:
| Chapter | Percentage of book |
|---|---|
| はしがき | ~2% |
| 第一の手記 | ~11% |
| 第二の手記 | ~35% |
| 第三の手記・一 | ~25% |
| 第三の手記・二 | ~22% |
| あとがき | ~4% |
As you can see, there are some big lumps in the middle, and on scrolling through the book I could not spot any breaks or anything… So the question would be, should we just cut it up into somewhat equal sections and call it a day? 
If somebody with a physical book could add more information to this, I’d be very grateful!