Alan is right. What are your needs? You can try many teachers Tutors in a trail session then pick one ore more for more sessions.

Hello, Teo. There are all kinds of teachers and classes. You can find one that fits your budget and your learning goals. Most people want to practice speaking in my classes, but others want help with writing. Why do you want to improve your English? :Is English a hobby, or do you need it for school or work? What are your weaknesses and strengths regarding English?