Re: getting started in long range comp.
If you want to get into LR competition, find an LR competition. I shoot F-class as practice for hunting myself.
Is there a LR Range in your area? if there is, find out about the shooting opportunities there. Often there's a civilian shooting club on a military base - find out if there are any in your area.
The rifle you have is a good platform from which to start LR shooting. You will find that some upgrades will help you.
I'm not gonna shoot here. I'm gonna shoot waaaaaaaay over there!