If you're in a mental health field, most of your research will involve psychology/counseling, so you'll usually want to start with PsycINFO. Adler uses the Ovid interface for PsycINFO because it allows for more expert searching.
To learn how to use PsycINFO effectively, use the drop down within this tab start with Databases: Subject Headings.
You might also want to review the Library Guide about PsycINFO for further tips: