Every annotated bibliography is different because what is required in the annotation varies from assignment to assignment - so be sure you're clear on what your instructor expects of the annotation.
Generally, though, an annotated bibliography is a reference list of articles that address your topic. You'll create a reference list, and under each reference, you'll have a 1-2 paragraph annotation that summarizes the article, and directly relates it to your research question.
See our Library Guide on annotated bibliographies for social sciences.
You can see some examples by doing a Google search for APA annotated bibliography. Here are some:
https://owl.english.purdue.edu/owl/resource/614/03/
https://guides.library.cornell.edu/annotatedbibliography
If you need help doing research for an annotated bibliography, please contact your subject librarian.