Being an Abaper, what would it be advisable for me to learn, SAPUI5 or ABAP on HANA?

Being an Abaper, it is clear that you should first go for ABAP on HANA. Here are reasons, why you should go: Abap on HANA is more about the backend. It has top-down approaches like CDS views, AMDP methods, and Bottom-up approaches like Calculation views and stored procedures. This is a video recording of a Live Webinar presentation by our Sr. SAP Solution Architect and trainer who is also a Manager in handling SAP Implementation projects. It will help you to better understand. No-one knows as no-one knows what the future will bring. All of them are in demand both in India and Abroad.

https://www.anubhavtrainings.com/aoh-cds-amdp-training