How do I get into finance while getting Engineering Bachelors?

Getting Bachelor's in Aerospace. Am currently a sopre. Would like to get an MBA after grad and go into finance. What can I get into this summer to benefit myself in future. Should or can I get internship in banking? OR am I best sticking with internship in Aero until after MBA? I want to help myself out the best that I can to get into the business field.