MAn the first one that walk by (as long as it isnt like a fawn with spots) but the first one that walks on by shoot it.
It will help with the shakes because you will know what to expect next time and you will feel alot more confedent in your self.
This was the first year i have taken any deer with my bow. And i have been bowhunting for 3 seasons now.
My first one with a bow was a button buck. then i shot an 11 point (but hes not very big but i did get him mounted because i was proud of the deer) then i shot a doe.
So dont worry about shooting horns just go out and shoot a deer.