I want to playtest!!!

Ok, Mick and I are still very very early in our design process, but I am impatient type of person and I want to start playing/playtesting NOW.

My questions to the faceless void are: Is this too early to playtest? Will we get any useful information out of it? Is playtesting this early really just playing for my own amusement? Is that even a problem?

If you even read this, let me know.