For anyone who aspires to think like a lawyer, it is important to know there is usually more than one way to accomplish any specific desired result, in theory, but the various possible methods are not equally useful or effective in practice. "In theory there is no difference between theory and practice. In practice there is." - Yogi Berra.
To learn to think like a lawyer is no exception. In modern times the main method of learning this is to attend a law school for three years and study hard. Prior to the advent of the modern law school, the method was to read appellate decisions and textbooks or to apprentice with an older lawyer, until you knew enough to pass the test. If you are a non-lawyer and have a legal problem you wish to handle yourself, without the immense expense of hiring a lawyer, going to law school just for that reason alone is not practical. It's faster and cheaper to pay the lawyer,compared to law school. So, if you aim to solve your own legal problems while avoiding lawyers, you are on your own to figure it out.
Be your own lawyer? It's possible, but not easy.