More info required please, like where are you, how big do you want the hedge to be, in sun or shade, small or large garden? And what's the main purpose of the hedge? To act as a fence? Photos would be useful too

welcome to GOY too.

at the bottom of this page is the alphabet. click on H and then there is a tab for hedges. there are also planting guides available on here too.
as already said it depends on what you want, formal or informal, wildlife friendly etc.