Programme transfer at LSE

I was accepted into BSc Anthropology but as the course start date approaches, I am getting more and more anxious as anthropology feels too spiritual. Although I do like the subject itself, I am starting to doubt if it's the right fit for me on its own. I am wondering if there's possibility to transfer from Anthropology to Anthropology and Law, which to me sounds more grounded and less abstract.
I understand Anthropology and Law is probably more competitive and I'm not sure if it's feasible at all. Any advice or experience would be appreciated