Getting an IB internship after sophomore year

How do I best position myself for an IB internship at a BB summer after my sophomore year? I have experience in investment advisory from last summer, and I am currently doing a VC/PE internship at a small but regionally well-known/connected firm. I attend a USNWR Top 20 school. To what extent do these experiences help? Do I need to take classes to learn modeling and valuations?