Have you talked to the professors at Vanderbilt who are themselves interested in AI / machine learning / data science? I was able to find a couple of them just now with a Google search.
At Vanderbilt (at least based on what I just found in a Google search) you could either major in math and minor in computer science, or major in computer science and minor in math. This plus a course or a bit of work in AI and data science would set you up very well for a master’s degree in either AI or data sciences.
You can certainly apply to other schools, make an effort to do very well in your current course work, and also talk to one or two professors at Vanderbilt. Then you will have some time to decide on your next step.