styleguides VS ABAP_starter

Already recommended Clean ABAP is a must read. However, it's a style guide and is not what I'd consider "best practice" content. It is also still debated in the larger community.

This concept is called hungarian notation ( https://en.wikipedia.org/wiki/Hungarian_notation ) and was very common in ABAP even with SAP-Devs himself but is obsolete since 2019 with the release of the "Clean ABAP Styleguide" from SAP ( https://github.com/SAP/styleguides/blob/main/clean-abap/CleanABAP.md )

Read Clean ABAP.

Clean ABAP also have some good pointers on what to do and what not to do: https://github.com/SAP/styleguides/blob/main/clean-abap/CleanABAP.md

Specifically for ABAP, there is just one free SAP course for beginners. It is a decent course but it does not really teach classic ABAP that you're probably encountering if you're working with an on-premise system. For classic ABAP, to be honest, there is no better source than my own book. :) It was written for complete beginners, explains very basic IF... THEN... stuff. I've heard from many functional consultants who used it to learn ABAP and so far no unhappy customers. The book is also recommended by ABAP Starter.

Couple of resources to start with. This article describes different roles of SAP professionals. ABAP Starter is a great resource for anyone thinking about learning ABAP. Most of SAP development still revolves around ABAP. There are other specializations these days but there is already competition from trained developers and learning curve might be too challenging.

ABAP Starter is a good starting point.

This is a good resource for beginners too: https://github.com/Keller-Michael/ABAP_starter

ABAP Starter (not just for "starters" and has more links)

Read ABAP Starter.