1. Your location

2. Your financial situation

You are in Hainan. If your family conditions are good, I suggest you come to Beijing to attend the Global IELTS. IELTS alone is better than New Oriental, and Beijing IELTS is also good. This single IELTS school is more professional and can participate in placement classes, which is more expensive and costs 2000+.

Also, personally, I think you should study well at home first, because this kind of remedial class can't improve your English, but only teach you learning methods and exam skills. Finally, you need to make your own efforts. I suggest you look at CET-6 or IELTS vocabulary at home first, and then come to class when the vocabulary comes up. This is the best way.

Finally, if you don't want to go out to study, read New Oriental at home.

Wish you success!