Internship Skills

I'm brushing up on general technical skills such as Python, Excel, VBA and am strong with presentations etc.

However, I know very little about S&T outside of just following markets. What should I do to prepare for next years SA Internship?

So far -

- Read Options, Futures and Other derivatives

- Keep reading market news (WSJ, Economist, FT)

What else should I be doing to prepare for SA interviews?

Thanks!