Welcome Bella. First off, there are a number of things that are different from what most of the world calls "football" and CFL football.
First, only one or two players on each team actually use their feet to move the ball. The rest either run or pass with it, block for those carrying it; or try and tackle the ball carrier or "intercept" a pass.
It is not -quite- as bloodthirsty as Australian Rules Football, but our brand evolved from the "gentler" rugby. In fact, the CFL's Grey Cup is awarded to the winners of the "Senior Amateur Football Championship of Canada". http://en.wikipedia.org/wiki/Canadian_F ... e#Grey_Cup
What the main differences between the CFL and American rules are: a field that is 10 yards longer and 15 yards wider. The endzones are 20nyards deep (vice 10 yards) and the goal posts are at the goal line, as opposed to the "touch line" at the back of the end zone. There are only 3 "downs" in which to advance the football 10 yards - American rules football uses 4 downs. In the CFL, every kick (punt, kickoff, field goal, drop kick, etc) is live, meaning that they are all available to be returned. The kicking team may recover a kick, but only the player(s) that are "onside" may do so.
Other thatn that, look for a wide-open, pass-happy game, with many twists and turns. One of the most exciting things about the CFL is that, even if you are down by 13 points with under a minute to play, YOU CAN STILL WIN THE GAME!!!
Hope you have fun following the CFL this year, and many years to come.