It sounds like you might be quicker just taking guidance what Simon did to set up a document in the Open office equivalent of word.
So your name in the header, right aligned
Narrow margins.
Select the double columns options but highlight your main title and select single column for that.
Font size 10 for your writing
In word, when you hit return, it tends to add extra space between the previous line and the new line. If Open Office does that, there maybe function to remove the extra space, which could be useful.