You can train yourself to do and be almost anything. Obviously, there are physical limitations to your dreams. Despite my best efforts, I will never play professional sports, mostly since I didn’t play in college or high school. Beyond that, your future is almost unlimited.
I once met a man in Alaska who was retired and had time on his hands during the winter. Being unable to get outside for months at a time, he taught himself a new skill every year. One year he learned to make cheese, the next to make the best homemade loaves of bread, and how to cook gourmet meals another winter. He would simply decide what he wanted to learn over the summer, buy a few tools to make it possible, and dive in with the help of YouTube, Google, and the local library.
The truth is that you can know anything you want to know. There are resources everywhere that you can access to help you. You can do anything you want to do. People are selling specialized items all over the globe for precisely what skill you want to learn. Others have put together instructional videos to help you succeed.
Suppose you want to know more about God and theology. You can do it. If you want to know how to be a better spouse. The information is there for you. You can become whatever you want to become. You can start today and set yourself on a different, and perhaps better, direction. The only limitation you have is your willingness to step into the unknown.