I can post, but...

Linking to text:

write text you want linked, select that text, choose “link” from the quicktags, paste your link, hit enter.

Posting image:

copy image location, on RA click img quicktag, post in image location, hit enter, write alt text, hit enter.

alternatively email root@region.com.au with image and story text and we’ll take care of it.

OK?

Start with the WordPress codex http://codex.wordpress.org/Main_Page

The article in particular that you want right now is about quicktags, because I take it you know nothing about HTML. Quick tags are those bottons at the top of the box you write your post content in, this is an excellent guide: http://www.tamba2.org.uk/wordpress/quicktags/