Maybe I can give you a half-hour lesson once a week on this board in our own thread!
Seriously though, try the community colleges throughout Calgary or the Chinese Cultural Centre down in Chinatown. You'll find courses offered at either place for sure. Good on you for taking up the challenge of learning a second language. Mandarin is the new language to know with China's rise in the world. A must-know language these days if you wanna have an upper-hand doing business internationally!