Before trying to understand the scholarly and peer-reviewed articles, get a firm grasp of your topic with definitions, topic overviews, and information written with the learner in mind.
Whether you're looking for peer-reviewed or just credible scholarly sources, most library databases allow you to limit your search results to just these kinds of articles. Take a look at some of these databases to get started.
Remember: there's a difference between scholarly and peer-reviewed. Scholarly is a much broader category and can include books, articles, reviews, opinion pieces, and more. Peer-reviewed refers to a specific process in which an article is evaluated by scholars before it is approved for publication.
If you're working on a literature review, you need to be strategic in your searching, and have a firm understanding of your scope, research questions, inclusion criteria, and which databases or indexes are most appropriate for your topic. Here are my recommendations and favorite resources for conducting literature reviews.