I'm very new to lock picking. So far my only tools are a bent paper-clip and a screwdriver, but that's going to change later this week.
Anyway, I have this old safe box with which I've been toying around lately:

When the lock is opened with the key, the key (turned clockwise) pushes two pins(?) towards the top, after that the bolt moves to the right. When I want to open the lock with the aforementioned paper-clip, I push the first pin up until something clicks and the bolt moves slightly inwards, then I push the second pin up and the lock opens.
So, I'm able to open the lock with a paper-clip, but only while applying pressure to the bolt with my hand, pushing it inside the lock. This means I can pick the lock only when it has been locked while the door was open. Of course, I would prefer to be able to pick it when the door is closed.
My problem is that I don't know where I would have to apply tension/torsion through the keyhole. As far as I can tell, the ring on the right side of the keyhole serves only to guide the key.
In addition, I don't really understand what kind of a lock I'm dealing with, although I have found this animation of how a lever tumbler lock operates, and it appears to be similar to my lock:
http://en.wikipedia.org/wiki/File:Lever ... mation.gif
Is there something like an illustrated overview of common lock types? Most of the lock picking articles I have read cover mostly pin tumbler locks, wafer locks and warded locks, and I don't think my lock belongs to any of these groups.
Thanks!