I want a log of all course creations and who did them.
If you add
//New course report
'new' => get_string('new'),
into the $actions array definition in /course/report/log/lib.php
then you can get a log of (just) new course creations, who made them when. You need to have the main (Site) course selected.
The only 'new' things that come up (for me) are courses which is what I wanted.