https://antongerdelan.net/opengl/ is a decent resource for learning opengl (the author was a TA in my graphics course in college :D). And I do think it's worth Lear ing opengl over vulkan today. Vulkan dials the api complexity up to 11. If you're happy with windows only, then directx 11 would be a good choice too, but I don't have a good reference off hand.

The problem with graphics programming is that really you need to learn two things simultaneously: how 3d graphics are rendered, and how to use a GPU api. They can both be a significant thing to learn alone, and the complexity of cramming the two into your brain together makes things hard.

Seconded, I too would like resources to learn more about this topic. Spend most of my time with business logic.

Try out an introductory OpenGL tutorial. There are many out ther. Just drawing a square will be a good lesson