Think about whether you can be good enough at something to be in the top ten percent. The answer is yes. It is not easy. There is no simple answer to getting there. The most effective ten percent wouldn't exist if it were easy. The process leading to it is not simple, even if there is a simple answer to the question. Top performers have the greatest efficiency. Peak efficiency means you can make more money doing less hours. This happens by doing the right things. These people generate the most added value for you and others. You can't be good at everything. You have to make wise choices.
It is better for you to be excellent at a few things than to be mediocre at many things. You should also know some things more than others. It is better than knowing as much about many things as others. Focus on core areas of expertise. Keep improving them. You're never done. Others will pass you by if you stay where you are. Nowadays, we are talking about ten thousand hours of focused training if you want to be a top performer. I agree to some extent. I believe there are shortcuts that reduce the number of hours. I also believe that ten thousand hours are not enough without talent. It can even mean double the number of hours. This may not be enough without talent if the competition is tough.
I don't think that constant training is enough to get to the top of the world if you don't have passion for what you do. Focus on your passions because they bring you the most joy and benefit. It's easier for you to enjoy the merry-go-round of good things through your passions. There are exceptions. One of them was Andre Agassi, whose father forced him to practice tennis so much that he hated it. I recommend Agassi's biography to you, where he goes through all the emotional scales that top artists experience during their lifetime.