My opinion is that if the teacher will tutor you individually, the result will be much better. If you want to find a good tutor in English, look at the website UpSkillsTutor - a specialized portal for selecting tutors, see resumes of teachers, read reviews of students and no problem to decide the choice.
Many people use the services of tutors and I see only pluses in this. This is a great opportunity to improve your knowledge, each tutor will find an individual approach and help you learn the subject quickly and easily.