Philosophize This is a very beginner friendly podcast. I'd gladly recommend it to anyone with even cursory interest. Then you go to History of Philosophy without Any Gaps. ;)
"The Denial of Death is a 1973 book by American cultural anthropologist Ernest Becker which discusses the psychological and philosophical implications of ..." clickbait! well, no, not clickbait, but death, but maybe it's the same thing? listen and you'll find out :)
Or if they're looking for written content, the Stanford Encyclopedia of Philosophy is a great resource. It has articles on lots of philosophical topics, and they're fairly accessible