When conducting an interview, one should follow a step-by-step process. Remember to record audiovisually, or take detailed notes, in order provide accurate direct quotes from your interviewee. Below are some examples of guidelines from reliable sources:
Online Writing Lab - Purdue University
The Write Practice - Joe Bunting
Columbia Journalism Review Article - Ann Friedman
When looking for interviews on the free web, use the tools you would use for evaluating any source on the internet. In general, if you are looking for an author interview, a good place to start is with professional journals that feature author interviews, such as these:
Brick Magazine - Interview with Tsitsi Dangarembga
Pambazuka News (Books & Arts) - Interview with Tsitsi Dangarembga
Or, search news outlets or online forums:
BBC News - Interview with Tsitsi Dangarembga
TEDx Talk Harare - Tsitsi Dangarembga on "The Question Posed by My Cat Concerning Extraterrestrial Cockroaches"
While "googling" for interviews of your individual or about your topic, you are sure to find various results. It is important to verify the reliability of the source of the interview. Use your site: .edu, or site: .gov search to help retrieve more relevant results. Try using Google Sholar for your search scope, as well. If you need assistance, do not hesitate to ask a librarian or Ms. Vidal.
For fun, here is one result when you Google "Tsitsi Dangarembga interview". Perhaps the title should have included that it was a mock interview!