Which kinds of authoritative information that you need for your research will you be able to find on the open Internet?
Have you found any potentially useful resources online that you can’t read without subscribing or otherwise paying a fee? If so, see if your library has a subscription.
What keywords are you using to search for sources? If you aren’t getting good results, what can you do to improve your search terms?
Investigate bookmarking tools. Will any help you find additional resources on your topic? How can you use them to keep track of online sources you find?