Main page can only be edited by admins. You are free to make new pages (this is a wiki).
If you want to discuss about it, we have no set procedure. We used an example wiki page and comments when we standardized the layout of the maze pages. Sometimes we discuss through our walls but most of the time, we use the discord.
I guess you are editing on mobile or with the visual editor ? That's buggy and always creates problems within tables and the like :(
Yeah, the pages under "my pages" are more personal and subjective in nature. For the chaos one, I'm not really a main editor for chaos so I just created a small page with just the info I need for my own decisions.
A few of us asked QC for the official image assets and we got access to many of them provided that we only use them for the wiki. We asked via private message on the official facebook of G&D (this was before the existence of the discord).
As for the encryptions schemes used in the APK; well, I don't think that QC would appreciate it if anyone published how it works. That would kind of defeat the very purpose of the encryption. This wiki being public and actually initially created by QC (I think, I got the admin status from them anyway), I couldn't rightly tell you more about that here.
Please, take the time to review your edits. You sometimes break the meaning or grammar of the sentence. Please, avoid using the visual editor, it has bugs, among which: it places links to pictures right in the middle of words which will screw up searching and is very confusing when editing source code.
The summary did show up in the history. Summary isn't all that important on a game wiki. On the other hand, you need to learn formatting. I guess you used the visual editor ? You should avoid it because it does tend to screw up things.
I reformatted your edits properly.
Usually the simplest is to use source editor and try to add your data in the same format as the page is currently in even if you don't fully understand the format. Just make sure to use the preview function to make sure it looks ok. That is if you are using a computer or big screen tablet to edit.
Once you feel a bit more comfortable, you can search online for wiki or wikia help for specific topics you need (links, tables, images, templates,...). Wiki/wikia is a big thing and you have to choose how deep you want to understand the various aspects of it because, simply put, you can't understand 100% of it and still have a life.