You can propagate from a leave cutting i'd imagine.

Echeveria do well by leaf cuttings. You can also behead the plant, root the cutting, and the stem will produce lots of offsets which you can cut off and root individually.

It will live pretty much as long as you can keep it alive.

Given good growing conditions, they are easy to get flowers from. You might have a hard time giving it enough light to keep it happy as far north as you are.

It really shouldn't have a visible stalk if it is small. The rosette should be right on the surface of the soil. If it there is a stalk, it is a sign of etiolation (lack of light). Old plants will develop a stem, but even then, all the leaves should be stacked right on top of each other. You should not be able to see the stem between leaves.