Ask HN: How should I setup a phone for a newly blind relative?

I am home for the holidays and my grandfather is newly blind. He's never learned braille or anything else and I believe it can be a relatively isolating experience. While I'm in town for the holidays, I would love to help him get back into things like podcasts, audio books and WhatsApp. Does anyone have recommendations for how to help set this up?

He currently has an iPhone but if android phones are superior for blind users, I would happily help him switch.