Advice to a SA

Hello, just thought I would post a question as I am in a state of panic, for background, I come from a non-target school and through networking, sculpting an interesting story, charming the interviewers on my super day, and answering the few technicals that were asked, I landed a IBD SA role at a BB (JPM,GS,MS). I’m in classes right now and compared to some other guys going into IB I am an idiot who’s just really good at talking. I am panicking as I don’t seem to be getting the advanced material I am studying and am worried it will effect me horribly come this summer as I will be competing against Ivy League and T-10 kids. Sorry for the long ass paragraph, but any help or tips on how to get it together would help!!