An applicant should learn more about the organisation prior to the interview and be well informed about the Job he is applying for.
Firstly, If you really want the job you have applied for and have the skills and experience to carry out the task, Then be free to say what you know and how you can bring knowledge and transferable skills. Show interest and dress smart. However, If there are some parts of the role that might be challenging, don't hesitate you are willing to train and learn quickly as you are looking for new challenges in life.
Definitely read the job specification and bring proof of any qualifications