I looked in Dreamweaver 8 and found the meta keyword dialog box here:
Insert > HTML > Head tags > keywords, description, etc
It's hard to find things so many levels deep.

The title seems to be found by a completely different route.

Modify > Page Properties > Title/Encoding
Meta tags are not visual things, that is why they reside in the code view only. The dialog box may be a disappointment; it doesn't offer any help. The Help section offers the bare minimum of "help" about header.
Viewing and editing head content
You can view the elements in the head section of a document using the View menu, the Document window’s Code view, or the Code inspector.
To view elements in the head section of a document:
Select View > Head Content. For each element of the head content, a marker appears at the top of the Document window in Design view. If your Document window is set to show only Code view, View > Head Content is dimmed.
To insert an element into the head section of a document:
Do one of the following:
In the Insert bar’s Head category, select click one of the object buttons.
Select an item from the Insert > Head Tags submenu.
Enter options for the element in the dialog box that appears, or in the Property inspector.
To edit an element in the head section of a document:
Select View > Head Content.
Click one of the icons in the head section to select it.
Set or modify the properties of the element in the Property inspector.
To be frank, it took me a while to find these. I had actually never used them and now that I've found them, I intend to promptly forget about them. I view this as the "tail wagging the dog." Let me explain what I mean by that.
It was harder (for me) to find and understand how to make Dreamweaver (sort of) do what I wanted it to do, than it would be just to open the code view and edit these short code snippets. I think time spent trying to get the program to do something like this for me is wasted, and the next update of the program would probably send me chasing down where they moved it. In contrast, any time that I spend trying to understand how to get the code itself to do something for me seems more like it will be paid back.
What I think Dreamweaver is really excellent for is as a tool for expedited learning about the code. Tinker with a test page of code, check the design view and preview in browsers, Oops, that didn't work, change again, preview, repeat...
For parts of the webpage that will never be visual, in my opinion it is easiest just to paste them in the code directly and to edit them in code view when desired. I don't think Dreamweaver is much help for this.
As for whether people in the east or the west understand code, I think we all can agree code is an obstacle in the path of making the web truly accessible.
I sincerely hope that you will try looking at other pages code for sake of curiosity. (right click, View Page Source) After only a brief look at your complicated webpage, I have confidence that code is within your reach to learn. Any time you spend learning about code would be well spent, and the good news is that learning about code is free to everyone who has web access.