PARK CITY, Utah: After turning 40, quitting her late-night talk show, traveling the world and living alone, Chelsea Handler is feeling more thoughtful and more insecure than ever before.

She wonders if audiences are still interested in what she has to say, and worries she might be an egomaniac for even thinking that.

She’s shifting gears, and she’s showing it, in person and on screen in “Chelsea Does,” the four-part Netflix docu-series she premiered at the Sundance Film Festival. It was released on the streaming channel last week; her talk show is set to begin in May.

“I wanted to do all those things: have fun, be ugly, be funny, sad, cry,” she said of her approach to the new project. “I wanted everything, like a phantasmagoria of experience. And I learned a lot and I had a great time filming all of them.”

The segment that affected Handler the most was her exploration of racism.

“The most mind-blowing thing was the racism in the South,” she said. “I just didn’t realize how bad it still is.”

Discovering that hatred showed her “how little I knew about the history of slavery,” she said, “and all of that ugly, dirty garbage that we have in our history as a country.”