Read the abstract of the paper
Abstract is generally a summary of the whole paper, including the research purpose and related significance, the important research direction, the important conclusions and research results, and the significance of related conclusions. Therefore, the paper is a summary of the essence of the whole paper and plays a guiding role.
Look at the overall framework of the paper
The paper will have a first-class title, a second-class title, a third-class title and a fourth-class title. Through each title, we can understand the overall framework of the paper and the direction of thinking and research. You can even learn some sub-topic skills. General headlines require a high degree of conciseness and generality, emphasizing accuracy.
Read the references in the paper.
The references in this paper are also an important part. The references listed in this paper are the sources of some conclusions in this paper. It can be said that these references have played the role of predecessors' shoulders. You can read these references to find out what experience this paper draws on and how to internalize the previous experience into your own things.
The above is my personal experience in learning a paper. I hope my experience and suggestions will help you. When studying a paper, no matter what method is used, the ultimate goal is to learn from it. As long as you can gain something, it is a good way.