How new option contracts get created?

Hi, I want to know how the new option contract are created. i have been trading option buying and then selling the same on Zerodha.

I don't see buy to open, Buy to close, sell to open, sell to close, option in the terminal. so my question is " is shorting calls or puts without first buying it creates a new contract. or is there different process for this.

i tried to short sell but was rejected due to huge margin requirement. just for for checking. i am new to this and dont have any intention of writing options as it is professionals cup of tea.

thanks