you should find out if the wealth management internship at the insurance company is just insurance agent in disguise. Those insurance agencies like to package their insurance agent job nicely with grant names and grant job descriptions to 'trick' the inexperienced undergrad in.

And you will only know if you are interested in something by doing it. use ur time in uni to do a few internships (take leave of absences if u must) and see which suits u most. And start with small banks... ur chance of getting into big/investment banks will be very low if you do not have any banking related internship experience to tok about.