Girl Online: Going Solo (Book3:Girl Online series) by Zoe Sugg

Penny Porter, a teenage blogger and photographer, is trying to move on after breaking up with her pop-star boyfriend, Noah Flynn. As she starts a new school year, Penny focuses on rebuilding her life, making new friends, and rediscovering her passions. She befriends a shy girl named Posey, who dreams of becoming a singer, and helps her find confidence.

While Penny struggles with self-doubt and lingering feelings for Noah, she ultimately learns the value of independence, friendship, and staying true to herself.