In American slang, When there is something that we do not like, or we find unacceptable, it’s popular to say that something is not your cup of tea. If you like something or you are good at it, feel free to say, ‘That’s My Cup of Tea’ or ‘It’s My Cup of Tea’. They both work. You can be specific: Speaking English is my Cup of Tea. We use the phrase with actions. Here’s a short, fun video for more information.
Remember, this phrase is used for physical actions or things that you can do. While I wouldn’t say that ‘learning English is my cup of tea’ I would say that teaching English is my cup of tea. What are you good at? What’s your ‘cup of tea’?