First face to face interview for a IB Boutique

Hello everyone, In a few days, I am going to have my first job (first timer) interview at Rothschild for a Summer Internship, I am an undergrad student, therefore I am super inexperienced with interviews. However, I have done 2 internships during summer, in a PE and VC. Consequently, I expect the question of "walk me through your CV". They told me that the interview is going to talk about technical stuff and motivation??????

Since is my first face to face Interview, can anybody tell me tips pls? Anything is valuable from body language to technical questions to prepare.

Thanks guys!