I have business qualifications from years ago, but I found that the experience I gained from working in different industries helped me out a lot more with the actual learning of how business is done in practice.
Certainly if business link are offering courses for free, why not take one and learn the fundamentals of the things you will need to know for your own business.
Something small like this is great for people becoming self employed, as there are a lot of things covered in traditional business studies qualifications which are somewhat irrelevant to the small business owner or self employed person.