There is no one right way to read and analyze a research paper. You may want to try a few different methods before you find one that works best for you. Below are links to pages that provide some suggestions on a few different methods. You can also search Google for how to analyze research articles (or some variation on that) and you will find lots of suggestions that way too!
Remember, you don't have to read the article sections in order. Read them in whatever order works best for you! Some like to read them in this order: Title, Abstract, Conclusion, Introduction, Results, Methods.
Reading and analyzing sources will also involve taking notes. There are also many different methods for note-taking. Here are some links for ideas and suggestions: