@tindall it's a wide field but I like https://generativeartistry.com/tutorials/ as a short intro and http://www.generative-gestaltung.de/2/ as a more in-depth one to generative art. Nature of code is a classic https://natureofcode.com/book/ that explains a lot of fundamentals that are used everywhere. Do you have anything specific in mind?
the mastodon instance at cybre.space is retiring
see the end-of-life plan for details: https://cybre.space/~chr/cybre-space-eol