Master lock 140
How do you pick a master lock 140, I just began lockpicking and I can't even get the first pin up. I've seen some videos and they say it has a security pin or something. How do I pick it, I need some detailed instructions for a begginner.
P.S. I have a homemade tension wrench made out of a uniball pen part, and a pick with a hook made out of a paper clip, I might be getting and actually set later if I can pick this lock.