Life as a teenager can be challenging. All the pressures of school, figuring out who you are and your place in the world. It can be even more difficult if you’re a transgender teen. Marlo Mack has been thinking about this a lot lately. She’s a single mom of an eight-year-old trans daughter. Puberty is just a few years away. In this excerpt from her podcast “How to Be a Girl,” Mack explores what life will be like for her daughter as a teenager.