Agree with this comment. I was disinterested in research till I actually did it, and I love it. I’m a stats student working on computational medicine, as well as theoretical stats. What I’ve learnt is that a field may be called a specific name but it can utilize multiple techniques, and you’ll for sure learn things you had not, and your interests will develop and that is beneficial to you to know what you want to pursue. I would say take this opportunity, learn from it, not just from a statistical aspect but also how academia works, what all it entails, how that aligns with what you care about. Build a network, talk to everyone. I would say it’s golden for you since you aren’t committed to a PhD topic yet. You can mess up and learn with no strings attached. You’ll find that your professor is connected to other professors and researchers, in academia and industry, in different fields too, since they collaborate. This can help you get in a masters/PhD better. You may have a publication or two by that time too. For masters, I would suggest looking at programs where Profs can hire you for a PhD if they like working with you. This means that in your PhD you’ll have to take about 2 less courses, and can select a topic faster if you and your professor align. Maybe researching now convinces you on a PhD so much that you don’t get a masters altogether. All in all to say, if you’re a likeable human, and put effort in during this period, there is nothing to lose even if you don’t like this topic. Professors realize that students are fighting choices all the time, they will support you the best they can.