Veteran job search post MBA in Europe

Hello everyone, I'm coming up on finishing 4 years in the US army as an officer and getting ready to move to Europe for business school. I'm planning to matriculate at one of the better b schools in Europe (along the lines of INSEAD/LBS), and majored in humanities subject at top undergrad in the US (Harvard/Stanford/Yale).

My goal is to live and work in Europe, hence me going to b school in that region. Prior to first day of class, I want to clarify my career goals. I am interested in entering a new career field - torn between finance or marketing. I am leaning more toward finance, but I'm wondering if my lack of prior finance experience or STEM background will work against me. If it is not feasible for me to secure a position in finance, I would shift my focus to getting an internship and job in the marketing field. Any advice on my situation would be appreciated!