Go do a tour like suggested above, and if you like it buy a dirt bike. You can get something pretty good in the $1500-2500 price range. Make sure you get the ownership of the bike so it can be plated for public trails in Ontario. There are lots of places to ride, most are a small drive outside of the gta, so depending oh what you drive you are either going to need a trailer or truck. Offroading is an inexpensive alternative compared to track days or even street riding if you have high insurance...and imo riding a dirt bike is one of the funnest activities on two wheels, complete freedom and adventure.
And if none of your friends want to join into an offroad addiction there are plenty of guys on here that ride.
Also when buying a dirt bike budget in helmet, chest protector, and boots as bare essentials.