Anyone can learn English. Not limited to small children and teens only. Anyone may also take English proficiency tests, such as those listed on britishlifeskills.com. Learning a language does not recognize the age limit. Especially if you intend to go to the UK and apply for a visa, then regardless of your age, you still have to pass the minimum limit for a visa to be accepted.
In addition to tourist destinations, learning the language, especially English has a lot of advantages. When you are fluent in a foreign language like English, then to learn other foreign languages ??like Japanese will be easy for you. Most importantly master one foreign language first and make sure you have smoothly used it to communicate. After that just then learn another foreign language.
Then with your ability to communicate in two languages, ??you become more rational in making decisions. This is because people who have two brain languages ??will process a problem and then decide not to use emotion alone. But also logically so that the outcome of the decision does not have a negative impact going forward.