I used to play a lot of golf and after a few years of playing I had gotten to the point that I was skilled enough to contend for our local club championship. To make a long story short I had a lead coming to the last hole and blew it. It was doubly painful as the fellow who beat me was regarded as the biggest jerk to ever swing a club, by most of the other members. My usual group was some great older guys from our area, the next weekend we got together for our usual game and everyone avoided the topic of my choke. Except for an old friend of our family, he took me aside and gave me some advice that has helped me and can help you too. He told me that getting to the top level of any game is a progression of steps. You must tackle each new skill either physical, or mental, as a step on a ladder. Skip a step and you go back to learn it again, usually painfully.
What he was telling me is that I had taken the physical steps to have a good golf game, but I was not mentally prepared to take that game out and play with it under the pressure of competition, just another step as he would say.
Any competitive venture be it golf, trapshooting, or competition tiddlywinks requires you to take each learning step, both physical and mental to succeed. Learn from the mistake you made on that last target, or first target. Question yourself on why it happened and take the action needed to be sure you do not repeat the mistake.