If you phrased your topic as a question, creating your thesis will be much easier. Your answer to your topic question (which is based on the sources you find) is the thesis statement.
Example:
Research Question: What effect does social media use have on our emotional health?
Answer/Thesis: According to several scholarly articles, social media use significantly increases jealousy and depression levels.
Think Like A Lawyer:
Sure, there's a temptation to write a paper that simply summarizes our topic. However, in ENGL classes, we don't usually try to write summary papers. Instead, we'll want to use the model of courtroom argument. A lawyer in a courtroom argues for something by presenting exhibits (evidence) to a jury that support their points. Likewise, as a college writer, you'll want to write a paper by presenting evidence that supports your argument. Imagine yourself in a courtroom trying to convince a jury to believe your point of view!