Amanchu!, Yuru Camp△ Recommendations
Yuru Camp and Amanchu! are both relaxing slice of life series about the outdoors with Yuru Camp focusing on camping and Amanchu! focusing on scuba diving. Both also include a dynamic between a rather laid back girl becoming friends with a much more energetic/silly girl.
slice of life with young school grils' extra curicular activities involving traveling
Together they are the most peaceful animes I know