[EricMausler]

Yes actually, I've been binging a lot of General Relativity content lately by coincidence and can say the Dialect YouTube channel has been the best resource for describing this. I'm not an expert so I cannot speak to its accuracy but it seems sound.

In particular the video "Conceptualizing the Christoffel Symbols". Also look at content on the Metric Tensor

Additionally, there is content from other sources (albeit less produced) on describing projective geometry which is also related