A large proportion of university students are unsure of career choice even after graduation. I fall into this category, only a year later did i decide my ideal role and even then I was unsure of deaired industry and company.
Mountbatten programme played a huge part in helping to confirm I love my career path and establish my desired industry. Hence, it is not only recommended that you go for this programme but also have a solid idea on what role you want as mountbatten would aim to meet exact requirements.
The year is very rigorous; you will be working full time hours monday to friday with some evening and weekend classes but it's really nothing to worry about. When your year is done, your achievemnets on work and study would speak volume on your behalf!