Dear Rajendra,
You can learn SAP HANA along with SAP BO BI.
One cannot say exactly how many days it will take to master, as it depends on the time you spent, your dedication and practice you do.
Usually it might take you 4 months to make you feel better. For certification you need to have hands-on to pass it.
SAP provides excellent documents and please refer the below links.
SAP BO BI: http://help.sap.com/bobi
SAP HANA: http://help.sap.com/hana_appliance/
Wish you good luck and welcome to SAP world.
Regards
Raj