Graduate / How to explain two years of gap in Statement of Purpose? [2]

I could not complete my 12th grade

Hi everyone,

I completed my 11th grade in Computer science back in 2017 and after that I had an accident and due to the physical condition I could not complete my 12th after that. I am applying for Diploma in Business intake at a few universities in Australia. The reason I didn't complete my 12th now is because I applied at NIOS but it's taking long time and even though this is not my fault I'm very anxious and worried, I really want to complete my studies and it has always been my dream to go abroad for my studies. While writing the SoP, how should I explain this gap? I kindly request you to help me in this regard.

Thanking you,
Ankita