Ranger 3, I've been having problems shooting left also and have discovered several issues. I agree with those above that your arrows may be a bit stiff. I would clear that issue up first for sure.
And I also agree with Lost Creek Bows that you must keep pushing and pull through out the shot. As a friend of mine says, never quit pushing, never quit pulling through.
The other problem that I discovered was that I was dropping my bow arm. The bow arm MUST stay stable and follow through until the arrow hits the target.
And lastly, do not take your eye off the spot you want to hit until the arrow arrives.
All sounds simple, but harder to execute on a regular basis.
Good luck, be safe and have fun!