Don't overlook the Library Search on the main library page. Watch this video for hints or jump right in at https://library.colum.edu
You can use Google Scholar (Scholar.google.com) to find journal articles even if they are not owned by Columbia College. For those, you can use Interlibrary Loan Request to get a scanned copy of the article uploaded for you in a few days. But in many cases, items cited in Google Scholar are available through Columbia College Library. This video shows you how to set up Google Scholar so that you get an alert when Columbia can provide access to the article with your Columbia single sign-on information.
"Google Scholar: Connecting to the Columbia Library Catalog," created April 2021, 3 minutes.