Taking interview as usual for me as former journalist is relatively not difficult. But how take in-depth interview for research is not easy. We must have a framework before going to the field directly. Interviewee potentially talks alot about many things that have no relation to our materials in research. The way that we must prepare is creating a framework.
Framework is such points that we want to explore from selected informant or respondent. It will guide us during interview. For newbie researcher (especially qualitative) points of framework will make our interviewing becomes rigid and has not enough flexibility. But, I believe sometime we can master technique of interview in line with our experience. The framework will be just our remind, unwritten in a sheet of paper.
As a newbie researcher, one thing important is to keep learning about it. Be patient !