Do I need to know web coding?

No, but you can use that if want.  Alternately you can type straight on the page.  Or you can copy and paste in text, from notepad so it is clean of any formatting.  Then pretty up the text with indents, bullets, etc..  You can also turn on spell check as you type or spell check after.  The site has an inbuilt, online wysiwyg editor.  In fact there are 2 versions of this as the site allows 2 text formats.

The first format is "Filtered HTML" which is a restricted set of HTML and thus has a simple editor.  This still allows block quotes, bullets, numbering, links, etc. so most of time this might be all you need.  It is all basic members are allowed.  The second format is full HTML will uses all HTML and thus has an editor with a lot more buttons on its taskbar.