Can't do much about that first shot, but if you hold down the trigger for a moment while the bolt cycles between shots, and then let up on it, it will "click" into a minimal reset position from whence only a single-stage pull is required.
If you let all the way back up on it, or release it entirely, it will go back to its original, long pull.
Hmm... I suppose you could remove some of the "hook" on the trigger so it releases sooner, but I really wouldn't advise that. I'd have to look at it good and long to be sure it wouldn't cause any other problems.