For an extensive introduction to writing research papers and setting up your topic / research question, read chapter 4 of the Handleiding Academische Vaardigheden 2.0 (in Dutch).
You can explore your topic using
Mindmapping is a nice technique that can help you specify your research question. This video explains how.
The most recent (online) reference works regarding Media Studies
In scholarly research, Wikipedia can be used for:
Please bear in mind that the various language versions of Wikipedia may differ: as a rule the larger versions (for instance the English version) is of a higher quality, because on average more people contribute to an article. Compare the article in the different language versions.
Another thing one can do is study the talk pages of an article. It shows the (low or high) level of discussion amongst editors. You can take that into account in your decision on how to use the information provided in the article.
Contrary to what is often thought, Wikipedia is a reference work with explicit rules, policy and control.
In the special LibGuide Wikipedia more details, background information and examples of good Wikipedia-use.