Hi Finn,
Welcome to our community! 
I second Yee’s opinion. Since everybody is an individual learner, there is no way to tell how you’ll perceive the RPG course. Maybe you’ll find it too challenging (for now), maybe you’ll find it easy to follow. However, if you stick with the problems and do research yourself, you’ll be able to learn basically everything you want.
If you feel comfortable with Unity and writing code, start with the RPG course. If you realise that it is still too difficult, go back to the Unity 3D course and complete it. Decide for yourself what is best for your learning journey.
See also:
- Forum User Guides : How to mark a topic as solved