Enjoy it. I’m so much more comfortable with myself in my forties than it was in, say, my twenties. I’m much happier being me.

Also - life isn’t over. I’ve been surprised at the prevailing ageism that seems too suggest that there’s no point taking up any new hobbies or learning anything because you’re just too old now for there to be a point. This is nonsense. You’ve very likely got as many decades in front of you as behind you - maybe more.

Also: use sunscreen.