Getting in pace with S4 HANA, New generation ABAP, IOT

Experts, This is regarding an issue I am facing (and a handful of my colleagues too).

Issue: In the faced paced world of SAP , I, being one of the SAP ABAP Developers, feel very outdated in terms of how I code and how to approach solutions. We are constantly in fear of the correctness (the right way of doing it in considering performance in HDB, new syntax from 7.4 EHP 5.0 onward, any many more ).

Could anyone of you please list down the steps which could take us closer to the current / latest developments in HANA and which could help us to deliver the best of the lot to the customers/clients?

From my own experience, I have been a technical developer for my ~7 years of career (SAP R3, 4.0, 4.6C, 6.0, 7.4, 7.5 versions), SRM 7.0 classic, extended classic, also, I have developed a couple of custom webdynpros in past.