I second a lot of the Cantonese youtube resources already referenced by others, especially the Hambaaanglaang channel. Aside from those, these books have been great for my brother's family:

https://www.amazon.com/gp/product/B089TS37JB/
https://www.amazon.com/stores/author/B089GJWS53/allbooks
https://www.amazon.com/gp/product/B08WZMB3W6/

My brother can speak conversational Cantonese, but can't read Chinese characters. All the books have jyutping available and some have pronunciation guides.