1: I have studied other musical instruments and passed the exam. Then get the highest exam directly, and some teachers will advise students to take the lower exam, hoping not to be fooled, because some teachers have kickbacks!

2: failed the exam. Then try taking Grade 3 and Grade 5, and wait until you can adapt to that situation before taking the highest grade. Some students have stage fright, so it's best to take the lower grade first.