Oceansun, shoot as much as you can.
Just starting out you need to decide which weight broadhead your going to use before you even buy arrows, whether you shoot carbon or alum.
Get the best arrows you can afford
The arrows you buy all depend on what poundage you pull, what your draw length is and what weight your broadhead is.
Once you settle on what arrows you shoot you need to spend the time and get that bow tuned to near perfection as you can get.
If your bow isn't tuned it doesn't matter what you shoot, you'll get poor flight and poor penetration.
A tuned bow with tuned arrows will shoot any broadhead accurate and you will know if your not tuned properly when you shoot that broadhead.