For anyone interested in computer graphics, I find Inigo Quilez's site (https://iquilezles.org/www/index.htm) more helpful than most of the textbooks on my shelf.
These types of sites are where I too learned most of the graphics programming I know. My favorite when I was young was "The good-looking textured light-sourced bouncy fun smart and stretchy page" still available here:
Good old Hugo Elias :) When I first visited the UK in 2003 I made a trip to London to visit him, guy bought me lunch at a Thai restaurant. Quality bloke, and yes we all (graphics programmers from that generation) learnt so much from his page.
Im very interested to learn about computer graphics but the more I look into it I kinda feel its a niche field and not much strutted resource or curriculum is available. Would you have any tips on where I should start?