What telegram channels have you joined as a dev?

Hi. I'm not sure if should be asking this here but honestly this is one of the very few communities i know of. I'm a student.I have college entrance exams next year and am trying my best to study. now the only fun in my life is coding and looking around Dev.to and recently i have been using telegram a lot. suddenly I realized that there are a lot of cool channels i could join. I'm personally a python programmer and Dev.to has helped me broaden my horizons A LOT. I'm just curious what kind of channels you think is useful for a dev? maybe even other online communities.