It was about 4 years ago I got my first permission and I was mega excited, and that alone can cause problems. When you have the quarry in your sights try to be calm because its easy to miss or even worse wound.
I would stay clear of heart and lung shot all together when starting out, their is very little room for error and I still now don't use heart shots. You should only aim for head shots only, whatever the quarry.
Camo all depends on what type of shooting your going to be doing. In and around building not so much, out in the field then you will want more. The feather kind can spot the s