If your purpose is to live and understand, then I suggest you have an overall understanding of philosophy first, and then choose the classic works of philosophy masters according to your own interests. This choice should be decided by yourself. I recommend you to read Wang Defeng's Introduction to Philosophy first, then Russell's History of Western Philosophy and Feng Youlan's A Brief History of China's Philosophy. After reading these three books, I believe you have the ability to choose your own master and your own philosophical direction.
As for building your own philosophical knowledge system, I think what you need is to learn wisdom first, then think and finally build it. After all, architecture needs a wide range of materials. If you read the works of several philosophical masters from the beginning, one of them may be difficult to understand at all. Second, even if you do, you will understand the whole philosophy, even the best part! In short, the whole comes first and then the part, otherwise it will fall into the dilemma of blind people touching the elephant.