When I was in the miliary, I worked on artillery gun lines, different ones from those that were towed behind other things and setup to those that were driven. I was a gun driver for a while, before becoming first sargent driver and training room manager (during which time I also won solder of the month for the Batalion and Army Achievement Medal). However, one thing that is true about all kinds of artillary firing is angles. Some of my best friends on those pieces were those who sat in tents with computers and calculated the angles and elevations that needed to be used to hit the target. The gun sargent had a device that he kept around his neck to help measure those angles to make sure they were right.
But, one thing that was always true was that your first shot was almost always destined to be a bit off. You could try to get the gun lined up just right, but there would always be things like how level the ground happened to be or the wind or more that would cause slight differences that needed adjusting to get it right. So, we would take a shot, and then we would adjust. It was the same thing that was done for rifle shooting, as well. There always had to be adjustments made, after you took the shot... sometimes several adjustments.
However, several things were true that are applicable, here. First, you had to have the courage to take the shot in the first placce. Taking the shot wasn't easy or without consequence. You had to stop and set the gun for shooting, which was a whole ordeal. Then, if you stayed too long after taking the first shot, the enemy would know your location and would shoot and hit YOU. So, it took precision, intentional focus, and determination to get the job done right.
Next, you needed to be willing to accept that you didn't hit the target. Something you did was wrong. If you could not receive that information, you would continue to get it wrong, over and over again. So, you had to take the information and adjsut and grow from it to be better. And, you needed to be patient to keep trying and keep learning. You also could not see how you are doing, immediately. The shot would be WAY out of visual range. So, you just had to keep trying, despite not seeing the effect of the effort.
Finally, you had to be willing to pick yourself up after taking your shot, put everything back in travel lock, and roll out to try another day.
So, my challenge to you would be this. As you keep trying to find the correct trajectory to accomplish what you want to have in life, don't give up, keep learning, keep trying, and be patient. In time, your work will bear fruit, but for today it may be enough to just be happy that you tried, rest in nightly travel lock, and be ready to take another shot, tomorrow.