After filling out an application, I received a phone interview. The phone interview was less than an hour long and consisted of questions about leadership - things like "what was the last time you heard criticism that was difficult to hear" and "what was the most challenging aspect of job X." Occasionally redirected the question - definitely looking to hear particular phrasing or particular ideas in your answers. My interviewer had some other stuff going on in the background, which was distracting but not problematic.
Unrelated to the interview, I realized that I didn't actually want to join TFA and did not fill out the online activity to proceed to the next stage.