* "Must" is used incorrectly. "Must" is used to express obligation or necessity, but it's not clear who is obligated. You are learning English, so it should be "a must for you," not "a must for me."
* The sentence is unclear. It's not clear why learning English is a must. Is it for work, travel, or something else?
Here are some ways to correct the sentence:
* "You are learning English because it is essential for you." This emphasizes the importance of English for the learner.
* "You are learning English because you need it for work." This specifies the reason for learning English.
* "You are learning English because you want to travel the world." This highlights the learner's motivation.
Remember, it's important to use clear and accurate language to communicate effectively.