Hello as well from another Matrix forumee (I'm just plain Wolfe over there), agree with what Wodin said.
As to smaller scenarios have a look at Gaza or Megiddo, if you have Breakthrough there are more smaller scenarios in that expansion as well as two very nice single front scenarios (France and Russia respectively) which can be a very good way to get a feel for the game before trying the full Call to Arms campaign.
If you want to have a go at WW2 you can download Storm Over Europe Fast Play or Fall Weiss II scenarios from the Repository, although both are the full WW2 campaign they are done on a smaller map and are give or take about half the size of the full Storm Over Europe campaign, I personally also prefer this scale of WW2 campaign - you get all the same decision making and experience the grand sweep of WW2 in Europe in a lot more playable format.
P.S. if you haven't already have a look at this thread as well http://www.battlefront.com/community/showthread.php?t=107356