... my question is, when
>learning to pick locks, is there a preferred shape of pick to use? I
>thought that it would make sense to use a rake-tip pick on a pin and
>tumbler lock, so as to learn how to pick by individually manipulating the
>pins...is this a good idea, or should I use a different learning >technique?
How does a rake allow manipulating one pin stack at a time?
People vary in choice - I like the finger/hook for this purpose. Many prefer the half diamond or round.
Another question I have is somewhat naive, but how do I mount the lock in
>such a way that I don't have to hold in my hand as I pick it?
In a board which it held upright (i.e. parallel to a wall.) Either hold it in a vice, or make an upside-down T shape to keep the board upright.