The main problem with Rincewind is that the entry point for his story is The Color of Magic+The Light Fantastic, which as the first two Discworld novels are muc

The main problem with Rincewind is that the entry point for his story is The Color of Magic+The Light Fantastic, which as the first two Discworld novels are much weaker than later books in the series. Guards Guards is just a much better first book to read, that or Equal Rites is more representative of the quality Discworld would come to have. Then again my first Discworld novel was Making Money and I loved it even without context (and the “Industrial Revolution” sub-series starting with moving pictures remains my favorite to this day), so you could probably just start at Sourcery and go from there anyway.