Some programs have funding that provides student stipends and various goodies. However, plenty of good faculty in your field are not in programs. Use the library. Start by recalling undergraduate courses and topics that you enjoyed. Look up those materials.
Most university libraries receive the major journals in every field that their faculty cover.
Journals like Science and Nature are one place to start, but they cover so many fields that they may have very few articles that interest you. Ask a professor or a librarian to suggest appropriate journals. Read through the table of contents for the past year or so in each journal, and examine whichever articles grab you. After a while you will begin to get familiar with the names of people who are doing work that interests you. You can also ask faculty at your current school to recommend potential advisors.