Stick to Option selling rather than to Option buying.
Try with ONE lot.
Initially you start with ZERODHA ,just because of EASE OF OPERATION.
I have not checked with other brokers you mentioned ,so my comments are reserved.
Wishing you all the best.
Sorry for late reply.
This is pure VANILA type of NIFTY graph in FEB series. (nifty movement in FEB)Most of the things are mentioned in the graph itself.
Blue boxes indicate the end of weekly expiry.
Green/White boxes indicate Nifty variations , Positive / Negative.