How to learn openGL?

So I have been following these tutorials : https://www.youtube.com/watch?v=VS8wlS9hF8E&list=PLRIWtICgwaX0u7Rf9zkZhLoLuZVfUksDP&index=1

But I’m not really happy with the progress I’m learning (now I’m at tutorial 5 of these series and If i try to rebuild what the tutorial has shown till 5th tutorial I will fail).Could anyone please post a link to a series of tutorials or suggest books that discuss (modern) openGL in detail while being simple*1?

Note: I’m only interested in learning the modern versions in openGL.
Note 2: I know mathematics and linear algebra so there is no need to suggest me a tutorial (or book) that focuses too much at this subject.
*1:for example I would describe the original java tutorials as being simple and in detail (I have said this example so you know how much detail is too much for me and what I consider simple).

Any suggestion is welcomed and i’d be more that happy if you suggest me something. :smiley: