If your device came with the 1.2 version, I'd stick with that one for now.
The 1.2 has an easier set-up than the 2.1 version.
In the 1.2, you only have to click "beginner" on a slider in one of the first pages. And that's that.
In 2.1 you have to set all settings individually.
I started out on the 1.2, flew it for a couple of weeks, then upgraded to the 2.1 and started tinkering with that.