Hi Chiranjib
If you know 5.3 quite well you are off to a good start. What Prasant has sent is a great starting place.
Like most posts of this nature I am going to say attend the GRC300 Access Controls 10.0 course as it goes through everything. There is also the OKP 0GRC10 which can be a good delta since you know 5.3
Also look at SAP Marketplace Installation Guides, etc for 10.0 Version. In there you can look at the Migration Guide which can give you some information on 5.3 to 10.0 translations
The IMG in SPRO has a lot of help information already there. Read this before you attempt the configuration. If the system has some configuration in place already the BC Sets have most likely been activated.
As far as this community goes, if you have a question search SCN first as there have been some very detailed responses - especially around getting your connectors and sync jobs to work. Once you get those up and running you should be able to work through the topics. If you find the need to ask for assistance, let us know your Support Pack version and provide screen shots, etc of what you have attempted. The more information you share the better the chance someone will be in a position to help you.
I learned GRC AC by starting with EAM (Fireifghter) as it was a simple module. I then approached ERM/BRM, RAR and finally CUP. I learned WF by doing the Role Approval one first and then went from there. My point here: break it down to small bits and start simply and build on your concepts.
Good luck and welcome to the community!
Regards
Colleen
