George I’m super middle aged and can’t remember a lot of stuff but here’s what I found: I just started out with what I remember and some of the details came back. Some didn’t but some did. Just think of stuff that stresses you out or that’s difficult for you. Yes I think we repress things so much we forget but we can usually remember something! And then we can remember something else. Believe it or not it’s all there.
My problem was definitely not stuff in the last few years it was childhood and young adult.
Just start writing. You’ll get there!!!!!