Where to watch "non-banal" Unity courses?

Question

C++ / C#

Hello!
The specific question is: where can I find unity courses that are for +- advanced users and that explain non-typical questions? For example: how to write Update correctly, which colliders are better to hang when, what should be taken into account when using while(), etc. And then the same type "Today we will implement walking, tracking the mouse and the clicker" have already got it.