Questions about Public Relations/Marketing?

[Asako]

I'm a Finance major and I'm in my senior year. for the past 2 years, most of my internships involve accounting and operations internships. Lately I've been questioning whether or not its something I want to do. I've volunteered with our school newspaper and have done some social media outreach/twitter updates and some publicity for my fraternity. A part of me wants to try to do a public relations/marketing internship to see if its another field I would like to go into, especially when I used to be a English major with a strong interest in journalism. However, is it too late in the game? In addition, how can I sell myself when they ask "you've done a lot of accounting and finance," why are you going into public relations/marketing?

My goal in the future is to open my own business and this is a way for me to learn about marketing. I feel like it would help me reach clients/customers and get my business out there.