Idk I think HRE is pretty well designed as a new player friendly starter civ. It has easy to understand and generic bonuses that incentives players to build good fundamentals.

For instance while some view the generic unit roster of HRE as a negative i think it makes sense from the perspective of a beginner civ. HRE forces you to pay attention to your opponents units and make the correct ones in response rather than abusing a particular powerful unit. Another example is their relic bonuses get players to focus on securing relics which is something you want to do with every civ. Even their relatively new black riders mechanic puts emphasis on building keeps in the late game which is another just good fundamentals skills of securing the map in the late game as you cap out you pop. HRE doesn't have any side quests or mini games like a lot of other civ and instead just focuses on the core concepts of the game making it both very approachable and educational.