Glad I could help. Since your cousin was recently diagnosed, and if he is not already on diabetes medications, he could start to lower his carb intake in steps on his own. DietDoctor is a fabulous resource for Everything Low Carb, and health including T2.
https://www.dietdoctor.com/low-carb

If not on medication and willing to dive right in, Dr Westman’s Clinic diet, now called Phase 1, in the new book End Your Carb Confusion, is explained simply yet with more detail than his previous "page 4".