I am so excited for you and hope you have a good time!!!!
I got to see Noam Chomsky speak at my uni. It was awesome. Don't expect to understand everything, either, but bring a notebook so you can write down notes. It helps you remember the parts of the lecture that stick out. I BYFAR did not understand the complexity of his lecture but I still got a lot out of what I could process. I want to see her though, she's a big inspiration.