Part of the research process is topic selection; begin by perusing the Choose a Topic tab.
For sources that provide articles, drug information, assessments, evidence-based information, systematic reviews, books, etc., choose the Find tab.
Select high quality information sources--the Evaluate tab will help you with this.
Writing and Citing tabs provide you with information on these skills.
Image source: Gray's Anatomy. 1918. Public Domain. Wikimedia Commons.