If it is purely a hobby, there is no need to spend a lot of money to study. Buy a few performance-related books and watch more movies at ordinary times, which can also help you improve your imagination from some aspects.
If necessary, you can find an experienced performance teacher alone, or study one-on-one in private. If you are an adult, don't consider going to an institution. More than 99% of the society is aimed at high school students' art exams. Adults and minors must have different ideas. Learning to perform together with a big age difference will damage the learning efficiency and the commercialization of institutions is too serious. The Ministry of Education recently severely rectified the chaos in education and training institutions.