Thanks for the feedback and it feels good to be graduating!
I used several sources including Google and Youtube to understand Blockchain. I generally like to think of Blockchain as a data structure which normally cannot be changed. However the application is different. I'd suggest looking at videos on Bitcoin and then videos of "How blockchain applies to the financial sector" etc. You get the feel of it over time!

Thanks for the invite and I'll certainly have a look!

Best,
Kiran