Dou You,
It would be highly inadvisable for you to play higher level competitive sports while a student at 1 CFFTS. Firstly, if you get hurt, you may well get recoursed or even face reclassification or release, if the injury is severe enough. Secondly, it will be very unlikely that you will be given permission to attend regionals or nationals, as the course schedule comes first. If you are given permission to go, training for your course mates also stops while you are gone- this obviously problematic.
1CFFTS has faced very uncomfortable pressure in the past to allow students to attend CISM sports events. To allow it, always impacts training delivery and course graduation dates.