RE: How should I aim????
The easiest way to answer your question...set up a target in your back yard or after the season starts, take a few practice shots from the elevation that you will be shooting from.
and one more thing an arrow or bolt traveling at 300 feet per second, thats 100 yards per second, takes 1/3 second for a 30 yard shot, that's mighty fast reaction to "jump the string"