I've been retired almost 2 years and still wake up at 5AM every day as if I was still working. For the first day and the next 6 months I spent about 8-10 hours a day tinkering in the garage, organizing things, cleaning out some junk, then a couple hours online to check TBN. Almost felt like a job spending that much time in the garage.
Many days through the summer I'd work only a few hours in the garage then go to classic car cruise-ins and relax with other car enthusiasts. Then winter came and still got up early, plowed snow, cleaned off wifey's car then back inside for coffee and internet time. I spend a lot of time working on classic cars for myself and friends. Cars are my hobby.
A couple months ago I bought a used travel trailer and this summer will do some traveling and camping. Its so nice to kick back and relax and only work when I want to. Wife and I don't have much family time as kids are grown and gone out of state. But most come to visit a couple times a year.
I enjoy being retired in my own way. A lot less stress, Blood pressure came down, able to sit back and smell the roses. I miss the people from work but not the job. I do stop and visit with them maybe a couple times a year and it still feels strange when I leave.
As mentioned, you need to have or get a hobby. At some point I expect my honey-do list to end but so far the list hasn't shrunk much. Seems like when 3 things get crossed off 4 more are added. Just keep busy and the time and days will fly by.
Enjoy your retirement..