Sagar,
...to what extent I should I know in SPRO (PP)....
Intimately
...Are the points mentioned by you sufficient?
Sufficient for what?
Enlightenment is a journey, not a destination. Every task and every client present new challenges. As you learn more and more about PP (and PP configuration) you hopefully will reach a point where you feel confident that you can lead any client through a satisfactory implementation, no matter how bizarre his business requirements may be. If you consider 'sufficiency' to be the point where you have achieved that level of confidence, then the answer is 'no', the links mentioned are probably not sufficient.
One of the best sources of PP configuration lies within SPRO itself. At the left hand side of each configuration item, there is an Icon shaped like a document. These Icons open up SAP's extensive inline help documentation. You should strive to understand every fact that lies in these help docs.
A free source of info about PP is SAPs online help. Start at Production Planning and Control (PP) - SAP Library
and work your way down the list on the left. I will say that if you master all of the information contained there, you will be more knowledgeable that most other consultants.
Another free source of info is Best practices, which includes, among other things, step-by-step configuration guides for various business scenarios. Start at SAP Best Practices SAP Best Practices Baseline package for India V3.607 and download/study the PP related docs.
Some consultants who wish to get a quick start decide to invest in fee-based classes. These are offered by SAP, and also by many certified training partners that SAP uses. Here are some courses available in the US, I am sure your location has similar offerings:
https://training.sap.com/shop/sap-search?q=Production+Planning&refine%5Bsolution%5D%5BSAP+ERP%5D=SAP+ERP
Some consultants choose to self-train, using textbooks as well as info found on the Internet. Here are a few books offered by SAP; Use Google to find more
Materials Planning with SAP. von Marc Hoppe, Ferenc G - by SAP PRESS
Variant Configuration with SAP. von Uwe Blumöhr, Manf - by SAP PRESS
https://www.sap-press.com/production-planning-and-control-with-sap-erp_3358/
Configuring Kanban in SAP ERP MM and PP (SAP PRESS) - by SAP PRESS
Best Regards & Good luck,
DB49: