If you are having a diploma then you are a step ahead than that of others who don't have this specific skill set. But with a Diploma you will not be able to get a JD of Business Analyst. But you can apply for analyst firms and they may recruit you and on gaining experience you can achieve a Business Analyst JD.

Always do Diploma from institutions of repute so that you can have highlighted CV.

Brush up your industrial skills and correlated skills that are not compulsory but are really very helpful. Try to learn those stuff.

At last a piece of advice : 'Think from the perspective of recruiter and go on doing your work.'. I think this will surely help.

Have a great eve!