Kumo Desu ga, Nani ka?

That does sound like something Shiro would do. 

You have to read the Side chapters Trust me all will make sense in due time, i at the start did to neglect them and hat to read the whole thing anew to not miss the connections to some thing that happen later on. Do yourself a favor and read them sooner than later. 

Some people skipped the parts which a didn't have kumoko in them and this is the wrong way to do it 

Human shaped, yes, but not human colored 

she became god 

How far into the story is stuff explained? People said to not skip the side chapters, but after reading them up to the War chapters, it makes me not want to read any of the story. So far from the side stories, its all useless shit cause all the important stuff is done behind closed doors. Does Okas side ever get chapters? 

Well, it isn't mentioned in passing, because there isn't a way for her to get stronger, apart from learning new ways to use her skills. Which of course she did in about 10 chapters. 

Kumo Desu Ga, Nani Ka has a weird story development because it loves to narrate events from other perspectives. Especially as the side stories started getting longer, like the human demon great war sidestory, which had like 5 parts, or the elf village battle, with its 11 parts the story got sidetracked, and events now feel like they are being repeated.

However, I still think the novel is best read in the authors writing order, which is the one you'll find on any of the TLs websites. I suggest reading blastotron up to where he's translated, then read the turb0 translations, then RTDs. Turb0's translation quality is somewhat messy, rife with grammatical errors, but the chaos does feel much like kumo's train of thought. Blastotron's translations are more fluid and less chaotic, developing the cutesy atmosphere better than turb0's.