Quite honestly, your GPA and SAT scores are below USC’s average by quite a lot. Plus, you don’t have any very consistent ECs except for your mentor from O’Melveny and Myers. While that is very interesting, I’m not sure it is enough. I am not the person judging your application so I can’t be sure, but I do think this is a reach school for you.
PS: My dad was a lawyer for O’Melveny in the 1990s/early 2000s and my mom was a paralegal there, small world 