Bocchi the Rock!

ぼっち・ざ・ろっく！

Hitori Gotou is a high school girl who's starting to learn to play the guitar because she dreams of being in a band, but she's so shy that she hasn't made a single friend. However, her dream might come true after she meets Nijika Ijichi, a girl who plays drums and is looking for a new guitarist for her band.

(Source: MangaUpdates, edited)