I'm still a significant number of years away (2024), but I just recently took 9 days off for R&R and went completely unplugged from my job. I'm not sure what your hobbies and interests are but mine revolve around camping, hiking, bicycling, learning, reading, DIY, electronics, woodworking, video games, cooking, baking bread and gardening.
I was up at 7:30am every morning, made a wonderful breakfast, went on a hike till noon around several trails with my pup, came home and cooked lunch, maybe started some dough for dinner (homemade pizza? Pitas? etc...), watched some educational videos out in my yard, drinking some tea, played with my dog, checked on my garden/pulled weeds, picked up the cabin, on slower days, I may sit down and read a book too. Evenings consisted of getting dinner ready, the SO coming home, talking about the day, and finishing up with a drink around the bonfire.
As I have a longer time without needing to worry about a 9-5 job, I'd probably hunt out some communities, events and start some monthly/quarterly travel plans. I'm interested in wine/beer/cider making and baking bread and plan on looking at cultivating my own crops to pursue that further. I just went to a farm this last weekend that also did their own cider and had done a hop/cider (Called Hoppin' Johnny. :) ) that was fantastic. If I had grapes, hopes, barley, wheat and apples all on my property, I would spend a lot of time experimenting with different ingredient mixtures.
I am also incredibly interested in Aquaponics for fish/leafy green harvests, so there's something else.
With the MMM lifestyle, I have found more and more of these little things (ie "God is in the Details") I'm interested in that I plan to pursue a little bit now, and significantly more so in retirement.
What are your interests and are there ways to pursue them even more so when you have all this free time? And remember; Financial Independence doesn't mean not working. It means not having to work.
Could it also be that the 'forced retirement' causing a level of stress that is preventing you from enjoying your free time?