If you're looking for paid instruction, check out "Professional Lessons", "Informal Tutoring", and "Instant Tutoring". Otherwise, browse journal entries and questions, help some people out, find users that you like or that seem helpful and interesting. Then, go to their profile and "follow" them. Perhaps they will follow you back. Feel free to begin messaging them and find out if they would like to do a language exchange. Skype is a helpful video chatting tool you can use to communicate.

Italki does not randomly match you up with other users to talk with. You must actively seek out an instructor.

There are 2 main possibilities. 1) You can book a lesson with a tutor ( formal or informal) and ask him/her all the informations that you want to know in order to improve your English. 2) You can send a message or a following request to other users ( it's better if you contact someone with which you can exchange language knowledge) and praticse with them or on skype, or texting