Did you mention what you plan to major in? I may have missed it. Some majors are more competitive at USC.
Don’t take the writing section on the ACT unless it is required (and I don’t think USC requires it). You would be better off focusing on one or two subject tests and taking the ACT again. A 32 is great, but USC is tough. And they don’t super score.
I honestly don’t think honor societies matter to USC. They want to see that you are doing what you love at a fairly high level. Your sports may count towards that, but you may want to branch out this summer and look to expand your horizons in some way. Get involved in research or leadership, perhaps. Maybe coaching sports at a summer camp? Something that you can continue at USC. They really want people who see themselves getting involved and making an impact. Also build relationships with teachers you plan to ask for rec letters. @CADREAMIN and @WWWard are experts in all things USC, so perhaps they have some better suggestions. Good luck!