Hi Sarmad
Coffee Corner is a space for banter. You were unfortunate to stumble into this area instead of Career Center
So first up, you actually were given appropriate space - seek out the career space. The second two comments from the rest of us was to (1) take the time to search which is a key SCN rule of engagement and (2) from me as Moderator of Careers space that you need to provide meaningful information to get a useful response.
I recommend you pay Career Centre space a visit and read through the blogs and discussion there. My comment relating to 80% of content being rejected is based on someone asking how to enter SAP without providing much information about themselves.
I'm not from a Functional background but if you post your question as is to that space this is how the conversation will go
Which Area to work in
You -- I have account background
Member - You should definately do SAP FICO as it is good skills match but then also Fiori, Hana might be helpful (or throw in some other shiny new tools/products)
Other members might then pipe in with learn S4HANA or Simple Finance as they are new shiny products for Finance background. Some might then suggest SAP BPC as extension for Finance background
What areas to study/look at
You'll be told to look at training.sap.com for SAP Education formal courses; open.sap.com for SAP MOOCs; hana.sap.com for some HANA information and so on.
So with those comments, in summary - go read up on the advise. If you still are unsure how to proceed take the time to write a new question and provide context (possible even which country/city you are located in).
Good luck with it.
Regards
Colleen