Congrats ! I did the same thing the first of last year after 40 years. At first it's a struggle figuring out your new life but then you'll settle in and be fine. I still get up every day at 6am and go to bed at 9pm. I'm not sure that will ever change. But what you will do is learn to slow down and take your time, you now have all day to do it and if it doesn't get done there's still tomorrow.