I stumbled upon Leonard Susskinds physics lectures on YouTube and bought the accompanying books [1]. The target audience are people like me, who had some intermediate physics and math lectures at university "before life happened".
The books and lectures fill the gap between "real" theoretical books / lecture notes and popular science books that try to circumvent math at every cost.
Exactly what I needed, thanks! Seems like the perfect company for self-studying physics next to any other STEM-related study (that keeps your math somehow up to date)!
[1] https://theoreticalminimum.com/