Yuru camp

• Non Non Biyori
• Sketchbook
• Yuru Camp
• Yuyushiki
• Tamayura
• Machikado Mazoku
• Koisuru Asteroid
• Anima Yell
• Locodol
• Kinmoza
• Gochiusa
• Supercub
• Kon
• Kobayashi's Maid Dragon
• Hanayamata
• Ochikobore Fruits Tart
• Sengoku Collection
• Chuunibyou demo koi ga shitai
• Spy Family
• Himouto Umaru-chan
• Asobi Asobase
• Urara Meirochou
• Flying Witch
• Hime-sama Goumon no Jikan Desu
• Maoujou de Oyasumi
• Hikikomari Kyuuketsuki no Monmon
• Dekoboko Majou no Otona Jijou
• Migakura Gakuen Kumikyouku
• Mitsuboshi Colors

What is similar? Does it need to be a band anime? Does it require social anxiety characters? Just cute girls doing cute things (CGDCT) in general? Have yuri elements?

• slice of life (SOL) with characters playing in a band: K-ON! (band aspect is secondary)
• SOL with anxious main character: Hitori Bocchi no Marumaru Seikatsu
• general SOL/CGDCT classics: Lucky Star, Nichijou, Azumanga Daioh
• more modern SOL/CGDCT: Kiniro Mosaic, Gochuumon wa Usagi desuka?
• SOL with yuri: Hidamari Sketch (moderate, also a classic), Yuyushiki (lots)

edit: I personally don't think that Bocchi the Rock! is super laid back, but if you compare it to action shows it obviously is. If you really want to go the laid back route you can look into the genre Iyashikei ("healing type") with anime such as Non Non Biyori, Yuru Camp (still have to watch this one so can't verify personally but is very popular) and Yokohama Kaidaishi Kikou (absolute classic).

A Place Further than the Universe

Bofuri: I didn't want to get hurt so I maxed out my defense

K-on

Out of curiosity: is Bocchi the Rock the first anime you watched that is not action-focused and has no monsters or extraterrestrial/extradimensional invaders?

As for my recommendation (but it's really a shot in the dark, given the scarce detail you provided), there's an older anime called "hitoribocchi something something" (I'm too lazy too look up the name) that I remember being pretty funny.

Super Cub

Karekano

Student Council Discretion. It actually has two seasons and an ending