I no longer do online classes with students. I just don't have enough time to do them anymore, sorry. There are lots of places on the internet where you can find native and non-native people who do online one-to-one English classes.
If you want to do them, you need to make sure that the person you are doing them with is a qualified English teacher. Unfortunately, there are many people who do online English classes who are not. Although they can speak English very well (many are native speakers), they don't know how to teach the language. And if you want to improve your English quicker, you need somebody who knows how to do this.
Unfortunately, finding classes with qualified English teachers can be difficult. Most of the people who are not English teachers will say that they are. The only way to make sure that you are having an one-to-one online class with a qualified and experienced English teacher is to buy classes through a language school. But they are not going to be cheap (at least $35 per hour).