If you think you may one day have to hunt for survival you need to shed some scruples really fast. As has been said, killing is the easy part and most hunters feel considerable affinity with their prey. Hunting is not about murdering animals, it is about fitting in with nature and taking what you need.
I suggest you see if you can track down a book called 'In defence of hunting' by James A Swan, HarperSanfrancisco, 1995. This book looks challenges a lot of stereotypes of hunters and may help start you on the kind of philosophical path that may help you form a view about whether you want to hunt and what you are prepared to hunt.
Please do not give up yet. Hunting may not indeed be for you, but you owe it to yourself to read as much as you can (providing it is sensibly written and not merely the ramblings of a greenie who ate a fermented carrot) and form a moral view from which to proceed.