Early on, you're probably looking for basic information rather than scholarly criticism/analysis. After entering your search term, look at the left panel and filter your search. Under "Source Types," check the "Reference Books" box. Or try Credo, which contains only reference works.
If you have all the biographical info you need, and want to read more analytical essays, using the "Peer Reviewed" or "Literary Criticism" filters will be helpful.
Pro tip: You can search Literary Reference Center and MLA at the same time. At the very top, above the search box, click "Choose Databases" and select both.