I think you'd better go to the local tutor center to find a tutor, because many problems in online teaching are not clear. I have worked as a tutor, and occasionally help students to answer some questions on QQ, but I found that students' problems come out on QQ and should be solved directly on the Internet. The typing speed is slow, because there are symbols and figures in mathematics, and it is ok to draw them on the computer, but the speed is very slow. If you must find a teacher online, unless the teacher is willing to send your questions to the QQ space to answer them, then you will have time to see them yourself and understand them yourself (provided that your own understanding of mathematics is better). If you don't understand them, ask them again for an hour every night. This method is a way for me to help students answer some questions in my spare time. If you have any questions, please email me :kekeyue.yue@qq.com.