A database is a collection of many different academic journals that can all be searched at once. Most academic journals use a peer-review process to review articles for quality before publication.
You search a database by creating a search query. Search queries use search terms and can have Boolean Operators and punctuation. Based off your search query, you will get a list of articles (and other resources) as results.
You can use Google Scholar to find versions of articles that you can access for free or through USA Libraries.
Make sure to be logged into your JagMail account on that browser, so Google Scholar will understand that you have access to USA Libraries.
In Google Scholar, you can search by author, article title, or subject.

Databases do not understand questions like Google can.
Databases talk through search queries.
Search queries are combinations of search terms, Boolean Operators, and punctuation.