So happy for you. New adventures, endless possibilities. I have 4 years left to get 30 year pension. I'm the type of person who has to be out of the house at least 4 hours a day, so I plan to work at a less stressful job and/or do some volunteering that regularly takes me out of the house. I get too bored staying home all day, even though I do write novels as a hobby. I might work at the library. I might volunteer at a nearby group home for children who are temporarily there while awaiting foster homes. I have my bucket list of places to visit, like Alaska.
Sometimes it's fun to learn a new language if you're thinking of visiting another country in the future. My friend volunteers on a horse farm where kids with disabilities get to ride the horses. I used to be a docent at the zoo when I had time. There are also museum docent volunteers. You might want to even start your own Meetup.com group.
Enjoy!