hi joe
it depends on what strength of wind and your weight. if your 12m is a bow or SLE it might provide enough range for you for learning. you might be able to even use the 12m as a one kite quiver if you have access to a more buoyant board with more surface area like a surfboard(but then again this all depends on your weight)
I used one kite for when i was just starting out and you gather more knowledge of what type of kite you want next as you ride.
hope it all goes well

mick