Regarding the research plan, address the following:

What are the best sources for finding participants who fit your criteria for inclusion in the sample?
Who do you need to contact to get permission to distribute your announcement?
How do you choose information-rich cases?

Regarding your practice interviews for the course, address the following:

Brainstorm ideas for asking friends and/or family who could role-play the task of the interviewee sufficiently to provide a rich, detailed interview.