Where to start!? Make sure that you have a quality range at your disposal and really, intimately get to know your gun at distance.
I limited my 3 sons to 200 yards while hunting for several years, until they demonstrated ownership of that distance. Now they are progressing out.
I would suggest the same to any shooter. Ownership and confidence at any distance is not the person who has never even shot at a given distance, then tries to pull off an ethical shot on an animal simply because they "think I can make it."
Find a good range - the longest you can get access to, and put in the trigger time to really get to know your rifle and your chosen ammunition.
Also, document everything in the beginning. You'll figure out what is really important to document as you go along.
Reading through these pages will give you access to incredible information and insight. Learn from some of the wonderful and truly gifted shooters and teachers here.