Ultra Sport is a fine plane to start with...
The AMA patern says under 11 lbs, and under 2 meters long, and under 2 meters in wing span...BUT..
I believe that if you show up at a contest to fly with that plane, you will be fine..
Patern is fun, you compete against your self in that you want to fly to what you percieve is the best of you ability!!
sure there are others you are flying against, BUIT 1st and foremost fly to suit yourself!!
just my opinion!!