The first thing to do is to gain the trust of the person from whom you wish information. Once you have established rapport, and this can take weeks. Gaining trust involves sharing and a degree of mutual vulnerability. If you wish someone to be truthful with you and to trust you, they must have a reason. Never confuse education with intelligence. The number of times I have been badly beaten in chess by an illiterate villager is a sobering reminder of this rule.

Your increasing familiarity with the individual and her/his circumstances, will help to suggest questions. If your language skill permit, you can raise a topic in which you are interested with a small group of individuals and listen as they discuss the subject with their varied percepts.

I am not fond of rigid lists of questions. Rather I prefer a conversation where topics emerge from a gently guided series of concerns.

Good luck with your endeavors.

Considering, ethnography demands immersion and embeddedness from the researcher, the first step is to visit the field-site couple of times try to have an understanding of the field, its actors and the gatekeepers. Semi-structured to unstructured interview works best for ethnography. Outline a set of questions that are simple to follow, devoid of repetition, leading questions or double-ended. Prepare an interview guide in conjunction that enables you to wade through the field and tailor your questions in accordance with the actors you stumble upon! In ethnographic interviews, the personality, reliability and approachability of the researcher will propel the interviews. At the same time, there may emerge untoward circumstances that may turn the respondent hostile or reticent. Therefore, although you must have an interview schedule and questionnaire prepared, it is advisable not to scoop it out in the field; instead rely on the flow of the conversation and punctuate the important questions in between. This will make the interviewing cohesive and allow the respondent to be herself (in terms of control over conversation). Remember each respondent is different with her own quirks and personality traits that said, the site, setting, time or other co-actors in the field have bearing on the trajectory of the interview. Hope that helps. In addition you may refer to 'Research Methods in Anthropology' by H. Russell Bernard.

Gaining trust and building the rapport with the participants is significant.

Visiting the field site for context will be beneficial.

An interview guide come in handy in this process.