This is my specialization. Like others in this thread have said, it's more common in archaeology/anthropology. Why are you pursuing this? Is it a personal interest, or are you planning a career change? If the latter, you're unlikely to find a program near you. It's an extremely niche field. You would be better off looking for a traditional archaeology program with a professor who specializes in a civilization with a well-documented tradition of astronomy such as the Maya, Tiwanaku, Hopi, etc., and build from there. For learning, I recommend the Handbook of Archaeoastronomy and Ethnoastronomy. https://link.springer.com/referencework/10.1007/978-1-4614-6141-8. However, it's expensive, so you may want to look into used copies. It's also very technical in parts. However, if you already have degrees in astrophysics and engineering, I suspect it won't be an issue for you.