Think of it this way; why should you get the course? Do you have a job requirement to be B Para qualified? Will this course make/break your career?
At this point, you should be more focused on learning your job/trade, not looking at courses that won't make you a better Veh Tech(or Sapper if you go that way). Once trade qualified, you will still be waiting around for a chance that may or may not come - plus I'm sure others will be wanting the limited number of spots your unit may or may not get as well.
Reservists in the QoR have a higher chance of getting onto B Para since they(the unit) have a jump tasking. The other 3 Infantry units in Toronto(R Regt C, Tor Scots, 48th) don't have a jump tasking, so the chances of getting a B Para with them probably isn't much better then the other units in the brigade(except for QoR of course). If you don't want to be Infantry, don't go Infantry simply just to improve your odds of getting a jump course.
Yes, one of the requirements for a NCM to attend B Para is to be QL3/DP1 qualified.
Just to add on this, it isn't easy or a guarantee you will get a chance for B Para(even as a Combat Arms soldier). Outside of the units with a Airborne tasking/and those with a job requirement, it comes down to right place/right time. Some may get lucky and get the course in their first couple years in, others have waited 10+ years and others didn't get the chance.