You can start your search using Summon (the search box below), the Library's discovery system. This is a very broad search that will find full-text articles, books, and more. The other databases listed will provide more targeted information as they are more specialized.
For all of them, you can use the limiters on the left side of your search results to select Scholarly/Peer Review (depends on the database) and Journal Article to get articles from peer-reviewed scholarly journals.