please explain to me

Step by step...

Yes I was install CkEditor to http://www.my_site/admin/
yes example pages works...

Now, please tell me how to:
1: how to edit text from html page where I haven't text area... ( text area is ugly )
2: can I load text from local file ( eg http://www.my_site/articles/my_text1.txt) in editor, edit and save?
If I can, how to do that...

Notice that I work on HTML5 based site...
If is this possible please tell me how( with simple example), or if is NOT, OK.. tell me.
I haven't whole life to read all crap from forum, to search examples from internet ( I allredy spent 3 days and nothing usefull I can't found)
So please simple--> Yes, NO, or if you have answer, please HOW with example...
Tnx
zmmaj