I went the same route. I have bought stuff from the 2000s for my 10yo girl: pink plastic digital camera, mp3 player, a desktop PC in the middle of the living room.
Btw, do you know any website where we can legally download mp3 ?
You can use SoundCloud, SoundClick, a lot of artists have set up MP3 downloads for their music there, Bandcamp, as another user mentioned, and also archive.org.
There's also yt-dlp, but I'm less keen on that because it doesn't do the ID3 tagging.
There's also yt-dlp, but I'm less keen on that because it doesn't do the ID3 tagging.