You should post something on Italki. In this post you will have to ask for someone to speak with. In exchange you could help people with your language skills. Therefore you could teach your mother tongue or any other language which you are able to speak. Another way to practice a language is paying a fee for a teacher by the Italki platform

Are you asking how taking a lesson works? If you book a lesson, you just press the button to "Enter Classroom" when it's time for your class. And if you don't want to use the italki Classroom platform, you can use Skype or Zoom, you and the teacher just add each other as contacts and the teacher will call you at lesson time.