Hi Arjun
Answers to your questions
1) Yes. Keep yourself updated with Lumira also
2) Being Techie, any reporting related module will be good for you. meaning if you do BW + BO with ABAP then you will be on top
3) HANA is database. You can opt this once you are expert in ABAP-BW-BO. If you know all these three modules & get some experience in it, you will understand yourself the need of HANA & its importance.
Regards,
AMol