Go to the library homepage, linked below.
Use the "Starting Your Research Here" box, use a research guide by subject, or choose a specific database on that page.
If you're off-campus, after you do a search, you'll see a screen with something like this, asking you to log in with your college username and password credentials:
Use the same credentials that you use to log into a computer on campus, or get into the Student Portal or BrightSpace. (The username is the first part of your college email address; it starts with s_lastnameinitial.)
If you don't know your username/password but know your Banner number use the Banner link to look them up: