Worried about summer internship recruiting

Hello. I am a student attending a semi target school (like UVA, UNC, Rice, USC) and will return to school in time for recruiting for junior summer internship.I had come to the realization that I want to pursue a career in investment banking. However, I have very little extracurricular activities which worries me. Before, I did not know what to pursue, so I have no prior internships except for an internship in the chamber of commerce in high school. My only work experience is tutoring kids and mandatory military service. I was a reserve force instructor where I helped instruct reserve personnel on various training such as shooting range training, chemical warfare training, etc. Also worked at artillery fire direction center where I calculated artillery angle and direction. Despite my lack of internship, I have a 3.94 gpa. I am reasonably worried and was wondering if I have a shot at a summer IB internship with my lack of real ECs. Any help/advice would be greatly appreciated.