If you are a beginner then I would suggest you work on the SAP MM module. And, SAP Support is a good way to understand the overall MM module functionally as well as technically.
If you want to learn SAP MM from scratch, then here's the right video for you:
But, If you have an educational background of engineering + MBA, then you can definitely think of becoming a Techno functional consultant in SAP MM area learn SAP ABAP programming going ahead. Consider doing professional training from an online SAP course, it will give you vast knowledge in a structured way. And, this will open up many opportunities. You can consider the S/4 HANA Simple Logistics module ( It has the new SAP MM processes). It is futuristic.