Decision on frame rate

Animated films made professionally are normally 24 shots per second. At this amount of shots the film are of a much better quality. I have decided initially to do 12 shots per second to start with but if I am finding that manageable I will restart and do it at 24 shot per second. I will have to evaluate it as I go but I will decide in the first 2 seconds whether I will continue with 12 shots per second or 24 shots per second.