Some beginners see videos of Unity showcasing DOTS and they instantly want to start using it, a regular question I get is "I'm a beginner, should I learn DOTS?" And to that I say that while DOTS is absolutely amazing (it can literally make your code 100x faster!) it is very much an advanced toolset, it is not meant for beginners at all. So I highly highly recommend learning the basics with Game Objects first. They are more than enough to make all kinds of games, tons of awesome games were made before DOTS even existed. If you jump straight into DOTS as a beginner you will likely be quite confused with all the complex terminology, learning both how Unity works AND DOTS at the same time is a very tough task. So yes I recommend starting using just Game Objects, learn how they work, learn their limitations, and then learn how DOTS helps solve those limitations.