I'm never read this author other book so I'm not her fans or anything, so my view on this book is based solely on the quality for this book only.
The story is about author life, to be honest really strange. Author keep telling reader he want to make manga from the start yet she never even tried "once". Trying and failing is one thing, but never even tried draw or even research on how to draw manga is another. Second she go to art classes that draw sketch and oil painting, I know both involve drawing but both are not exactly the same, in the end of course the author realize. Second the teacher on the cover was not all that good, with strict and inconsiderate personality I find it difficult to understand him, even after the book end.
Some maybe say this is book for regret but to be honest when I read it, it just some across as an act to whine. The whole book is whine, whine, whine, brag and repeat, the collage arc is one of the worst with author keep whining for an entire book, the author admit that collage is pretty much blank canvas, but do a blank canvas need whole book to explain it? Also the author may looks like she regret doing thing, but to be honest it doesn't come across like that to me, author feel like a simply ignorant human being, by the end I don't feel anything, not sad, not happy just a confused feeling at how her life even made into book despite her life that not that great nor sad.
The story telling also come across as a mess, author often put the summary in the front before he goes into the detail pretty much remove all the surprise. The story also often take a unnecessary detour which sometimes is really annoying.
Kakukaku Shikajika is not that good, I still can't relate to the author at the end I feel blank, author trying to make it sad but I just don't feel it. The story telling can be quite a mess, the author often repeat herself, it just not as good as other people make it to be.