The eight-part series of one-hour episodes will explore the reality star's new life as the person she says she was born to be.
"So many people go through life and they've never had to deal with their own issues -– no matter what those issues are," Jenner, 65, can be heard saying in the preview. "Ours happen to be about gender identity, but how many people go through life and waste an entire life because they never deal with themselves -- to be who they are?"
In the sneak peek, Jenner can be seen applying makeup at a vanity in her secluded Malibu home, while learning about what it means to be a woman.
"You start learning all the pressure that women are under all the time about their appearance," she says, while applying lip gloss in front of a vanity.
She revealed that she had a professional do her makeup for the first time.
"What a difference," she laughed.
The promo also shows Jenner going "out into the world" after months of hiding out in her Malibu compound.
"It's so bright out here. Look at that," she says from her vehicle. "Isn't it great that, maybe someday, [I'll] be normal and blend into society?"
When her passenger says Jenner is normal, she responds, "Put it this way: I'm the new normal."
"I Am Cait" premieres July 26 on E!.