1. It is impossible to change tutors, but each tutor will have many small research directions. You can talk to him about whether you can change a small direction.
In fact, the direction you are engaged in is not important. What I finally learned is the tools and ability to deal with problems. According to a survey, more than half of the graduate students are not engaged in the direction of future graduate students, but have turned to other small or even big directions.
Sometimes the research direction is not what you know now. Some directions look relatively new and popular, but it is not easy for everyone to do it, but it is not easy to produce results; Some directions are more traditional and unpopular, but they may be relatively easy to produce results, and the impact of the results may be subversive.
4. So the direction is not important. Let's "get married first and then fall in love". Interest is not innate.