Early 30's here. I was at a small gathering my best mate put together about a year ago, and his 19 year old nephew was there. He expressed his interest in anime and we got chatting. While showing me some newer anime-related TikTok stuff (I have no social media myself and haven't really kept up with modern anime), I heard some fucking awesome 'aggressive trap' stuff and asked him who the artist was. It was Lil' Darkie and I was immediately hooked. I went down a rabbit hole searching his best stuff as well as other similar artists, and now have a huge playlist of great music I'd have never discovered on my own.
imo music discovery is a pretty organic process for most people. It's cultural and spreads via word of mouth. Chatting with younger people may be the best way to go, but understand that the youth rightfully don't want us in their spaces lmao