For my generation, Joyce Maynard's Looking Back: A Chronicle of Growing Up Old in the Sixties pretty much summed things up. The author, an elfin, barefoot figure in jeans and a yellow sweater stared solemnly at the reader from the cover, and you got the picture. This is an "old soul." Maynard's book was highly praised at the time and since its publication in 1973, she has written about the various stages of her life. She was born in 1953, so she's gracefully aging into her middle years now.)
If you want to write, write. Life is not a dress rehearsal.