Suggestions for sophomore summer into junior year Capital Markets internships

I am a sophomore currently at Indiana University Kelley School of Business. I have become more passionate about capital markets (not sure DCM or ECM yet) over the past few months and want to take this summer to see what fits me. I have not had any professional experience in the finance industry but I know I need to gain experience in the industry before Junior year internships. I am wondering what would be the most helpful internships where I can dial in on if DCM, ECM, or IB is for me. I would want to be able to gain meaningful experience where I can see which path would fit the best for me. I also want to get into the industry and begin to expand my network to further my connections. I do realize that many internship applying periods are approaching or have already passed. Any suggestions on how I should narrow the internship process would be greatly appreciated.