Another issue you need to take into consideration is research ethics. Depending on which country you live in, your research proposal must pass a human subject board. In other countries this is not necessary; nonetheless, there probably are data protection laws to observe. When you conduct interviews, it is mandatory that there is informed consent between you and your interviewee. This can be an oral agreement or in form of a signed document. You need to explain the purpose of your research, what you intent do with the data, who has access to the data and how long the data will be stored, and in which form the results are used and presented.
A common procedure is to make the data anonymous, . to replace all identifying information like names or persons, location and places, professional status, etc. with pseudonyms or abstract characters like A001, A002 and so on. In preparing a written consent form, pay attention to the respective data protection laws and include the legal regulation and consequences in the formulation of your text. You find examples of such forms online and also in some method books (., Helfferich, 2009).
In summary, a qualitative research question mainly focuses on “W” questions; distributions across or within large populations are of lesser importance and often cannot be examined due to the nature of qualitative research itself. The question should not be too broad, but also not too narrow. And you should be able to examine it at all. A prerequisite is that you can gain access to the field. You may have formulated a perfect qualitative research question, if putting it into practice requires talking to all ministers in your country and you do not have the right connections, your project cannot be realized. Before you continue to invest a lot of time and effort in a research idea, check out whether you can find participants. Talking to pupils in schools often takes a long process of getting permissions from the school board; you cannot just go to a schoolyard and talk to kids there. Military institutions are another case, where you need to adhere to specific procedures to be allowed access. Recently some students wanted to interview people that have converted to Islam, but were not able to find individuals that were willing to participate. Others were interested in people that are addicted to sports; they ended up changing their topic as they did not manage to get contact with such persons. In qualitative research terms, they could not access the field. Thus, there are not only institutional hurdles to overcome. It is probably easiest to find participants for your research, when the research question is based on your personal background or related to your social context. In other cases it is not impossible, but more difficult.