Hi Ashik,
You should know HANA hostname or IP address, and also have a HANA User id and password.
With these things you can add a system in HANA Studio.
Check this sytem on adding a System in HANA Studio
After you are done adding you can see ABAP Schema if you have authorization for it.
Its better that you contact HANA Administrator for your User Id and Schema privileges
Regards,
Vivek