Good day! It is great to see you trying to continue your hobby up here. Please have a good read through the FAQs and the noobie tank because if you have a question, someone has probably already asked it.
As for where to start, GET AGE VERRIFIED, what this means is an AVer just has to have a face to face meet with you just to make sure you are of age. From there you will be able to see everything the retailers have to offer to you. Go from there.
I assume you have some knowledge regarding to the sport so sign up for a game in your area, you can find upcomming games posted in here http://www.airsoftcanada.com/forumdisplay.php?f=68
Browse around and familiarize yourself with Canadian regs because everything is complicated up here with regards to airsoft