Freshman Summer Internship Advice

Hi,

I'm a first-year student looking for insight about internships for summer 2019. What kind of roles should I be targeting now if my ultimate goal is IB?

I have been researching marketing/finance internships at f500s, MM PE/VC roles, internships with AM firms, and BB PWM (I hear most of the work in PWM is bs). Which of these would give me the best learning experiences and put me in a better position for an IB SA position?

Thanks in advance!