Lennon's Double Fantasy was the 1st album I ever purchase. At the time, I didn't know who the Beatles were. To me Paul McCartney was part of Wings. It wasn't until Lennon's death that first knew who the Beatles were but I was only 12 when Lennon died.
I'm roughly your age but was fortunate to have an uncle who anticipated by the time I was 5 that I'd be a Beatles fan, and bought me the 1967-1970 anthology on cassette. What that ripple in a stream did for me. So I knew who John Lennon was when I got the news Tuesday morning (I'd already gone to bed Monday night) - a bittersweet story I've told here in years past. John's is the first death I specifically remember - not Elvis's, surprisingly.
Funnily, I'm not sure if I knew who Wings were at that point. I knew "Silly Love Songs" and maybe one or two others, but only as songs, not connected to an artist.