Hi Kiraang,
> What our management has decided is to use the Oracle Data Guard for setting DR configuration instead of any OS specific script, and for that I need help or possibly step by step guide with screenshot
Why not getting some training about Oracle Data Guard first, if your management has decided to use it? Oracle Data Guard is a powerful HA solution and could not be implemented by just following "a screenshot guide". You need to think about different kind of settings (like LGWR sync/async, ARC and so on), the possible tools (DG Broker or not) and all the other stuff and verify them with your business requests and its impacts.
Please get some training or an experienced consultant - seriously.
Regards
Stefan