Changing Full-time Application into Internship Application

Hi,

I recently applied to MBB for full-time positions since I'm a final year undergrad student. However, I have decided to embark upon a one-year Masters programme after my undergrad. I think it makes more sense to withdraw my application and apply for summer internships instead, as a rejection for a full-time position now would mean I am unable to reapply for two years - I could definitely do with more time to prep for case interviews. Firstly, is my conclusion illogical, and secondly, any recommendations on how to go about this?

Thanks!