In your situation, you'd better find a teacher to tutor. Adult 120 bass piano. You can test the level of other pianos because they are too small. However, it may be necessary to contact the Conservatory of Music for the grading examination. If you have a teacher to sign up, you can take the CET-5 in about two years. There are many places selling pianos near the Conservatory of Music and Wen Yi Road.

I also learn accordion, but I'm not in Xi now. I'll just give you a general idea. If I go to the Conservatory to find a student to teach, it shouldn't be very expensive.