There are a couple of great ways to find professional organizations in your field.
Option 1: Google professional organizations in your field. For example, I'm a an academic librarian, so I would search "professional organization academic librarians." Once you've found an organization, review the site for all the other information you need.
Option 2: Check O*Net.
Want to see some examples of writing in your discipline? Check out this guide for samples.
Consensus on major issues in all fields can change regularly. As you begin your research, think of all the research on the topic you choose as a conversation. You, as you become a scholar in that field, will join the conversation.