Continue with your research, by now you should be well on the way to having some interviews organised and you should have created your surveys. If you are not getting any replies from your interview requests, consider asking some other people. Expect these sort of roadblocks, and keep persevering until you get the information that you need! With your surveys, consider ways that you can make it available to as many people as possible.
When you are ready to start recording information from your secondary resources, watch the clip below so that you have an understanding of how to go about it.