You don't need to be a club member to join IPSC. You just need to find out who's offering the next Black Badge course and where.

http://www.ipsc-canada.org/
https://ipsc-ont.org/

You'll want some range time before you do that course though. If I recall, most instructors will insist that you have some experience with your gun. They want to know that you can safely handle it. The Black Badge course isn't one for newbs who want to go shooting for the first time.

I don't know Scarborough, but a quick search revealed Sharon Gun Club.

https://ipsc-ont.org/clubs/sharon.htm
https://sharongunclub.com/

While you research clubs and wait for a response from them, get familiar with your guns. Do some dry firing. If you can, find someone who can bring you to their club as a guest.

http://www.targetsportscanada.com/