Astrophysics Interest

I’m currently a junior in high school studying down here in SoCal with an interest in astrophysics, currently taking Physics AP and got admitted to COSMOS program for physics and machine learning (super excited!) -
How is the program like for UCB? This is one of my top schools of interest when applying for uni’s and want to see how’s the program like for those currently attending or who have attended. Any tips or recs are very much appreciated!!