To learn English, you must first understand your own foundation. How is your English level now? I suggest you take an English test first, and then study accordingly.
When choosing, it's best to find those regular brands, well-known institutions and brands that guarantee quality in advance. Generally, large organizations, old brands are more reliable and have more user experience. It would be much better to find a full-time English school if there is enough time. In the learning process of iBS, students are immersed in the world of pure English all day, away from the interference of life and work, and only concentrate on learning English.
There are many choices for adult English training, which are generally divided into three categories: workplace English, daily language and English for going abroad for exams. Ordinary adults want to improve their spoken English to meet the needs of daily life, work, social interaction and leisure. Learning English is a persistent thing, and it can't be done overnight. You need to be mentally prepared and make a detailed study plan.