It is harder than it looks. Believe me!!! I missed several birds before finally connecting on a nice Rio in Kansas this year. Read this story. http://www.huntingnet.com/forum/tm.aspx?m=2076126
Aim small miss small. Try not to take shots until they stop. Make sure of yardage by using a rangefinder and know where you are supposed to hit them. It is a very small vital area on a turkey. Only about the size of a baseball or a little bigger.
Even harder without a blind. A lot of movement to draw the bow.
Have fun.