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This ^ is a great place to start to assure yourself what you need to know.
The way I see it, you shouldn't have any problems to start to enjoying life now.
As I have said, I am going to retire. That is not the issue.
Since you do enjoy working, but it is affecting your health, and you are FI, you have a big advantage. Try approaching your company and suggest the position you want to have! It may be a lower level, but if it fulfills your work need and still makes you some money, keeps your health benefits, sounds like a win-win. Just get your ducks in order and have the ability to really leave if they don't have room for you elsewhere. Good Luck.
I like working, but I don't like my current job. I think they probably would prefer me to work half-time than to leave. But, knowing them, they would pay me half but dump a ton of time-consuming work on me that couldn't really be done in half the time. The job is very stressful. Also, I need a break. Not just mentally, but because work is taking a toll on my back.
For me, there is no decision about "how much money to spend." Rather, the decision is "what do I want to do?" Really, you could spend an awful lot of money doing very little. For example, you could buy super expensive non-fungible tokens or have all your food gold plated if that would make you happy.
In my case, our life in retirement is almost exactly the same as life before retirement in terms of what we do and how much it costs.
How much I want to spend and what I want to do are not unrelated. You have not changed what you do or what you spend. However, I absolutely intend to spend more money in retirement than I do now and to do different and more things in a different location. That does not mean suddenly buying a luxury car or fancy clothes or anything like that. And it will not be to spend money just to spend money. I do not want to continue living where I am living, and all of the places I am considering living are significantly more expensive. Also, when I am not working, I will have more time to do things that I want to do.
In addition, because of my back injury, it is important that I not do things that would make it worse. (That includes my job.) So, I am going to be paying other people to do some things that I would have done myself in the past. I don't want to do something stupid by being a tightwad. I also am going to be paying for things that will help with my back. That includes doctors and physical therapy, but also other things like the right (expensive) shoes or paying for a personal trainer. (Maybe if I had paid for a personal trainer in the first place, I wouldn't have injured my back working out!)
I've always loved to travel and have been willing to spend money to travel (on a budget), but work often interfered. I also want to be able to travel to visit family that does not live anywhere near me. If I can handle traveling in a healthy way, I intend to do it, even if I have to do it in a more expensive way now and without the backpack.
Brian Tracy has some good videos on goal setting. What would be your perfect day now and in 1, 5 and 10 years? Only you can answer that. The posters here on this forum have very different ideas. Even many of our close friends have really different ideas of a perfect day. And then even how much money to spend for the same type of activity can vary.
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I find books on happiness research to be real money savers because most of the science based factors that make people happy, like social connections and getting out in nature, aren't really expensive compared to what advertising has conditioned us to believe will make us happy.
I totally agree. I've recently bought some books on retirement, and none of them are financial. They are to help me figure out what I want to do that will make me be happy in retirement. A lot of those things do not cost very much money at all. But, I've realized that I do have to do some financial planning to make sure I can do some of the things that I hope will help me have a healthy and enjoyable retirement without stressing about the money. The single biggest thing probably will be figuring out where I can afford to live.