SEBI / RBI Sandbox for Fintech Startups

I have read through a few articles on the proposed sandbox by sebi / rbi for fintech startups. I would like someone who understands this to explain it in a non tech / layman terms.

I had a startup concept / idea in mind but on doing detailed research on the subject I found out that what I was trying to achieve is actually not allowed / restricted by sebi. So I did not take it forward.

If the sandbox allows me to work on ideas / concepts which may or maynot be approved / restricted by SEBI currently but would allow us to build, test and analyse it within the sandbox frame.

If I would like to know more details and information about the proposed sandbox, could someone point me in the right direction or connect me with someone with knowledge in this regards.