I may have encouraging news for you. I believe the Yale you are talking about does offer drama classes. https://www.drama.yale.edu/ But please know it is extremely competitive to get into Yale regardless of your major. Certainly apply, but it is always good practice to apply to a number of colleges at the same time. Many will have both fields of study in which you have an interest. Sometimes acting departments are referred to by colleges as acting, drama,or theatrical departments. Search for all of those terms
Generally speaking a law degree will offer more career opportunities but we need great actors as well. Good luck Alyssa.