Keigo Resources?

Hi, does anybody know where to learn Keigo, I need it since I’ll be working in a customer-oriented job in Japan (answering calls, addressing concerns etc.). Any resource is appreciated. I don’t need to learn everything, just the ones that are common in calls or so. I also like immersing, so if you know any manga, anime, or j-drama that is in an office setting and uses keigo, please let me know, thank you!