I took semi-retirement two years ago from a busy teaching career. I can't pretend I took to it like a duck to water, and it actually took around a year before I settled into a routine and decided where I wanted my life to go. For me, full retirement was just too much of a shock - having devoted myself to career and children I found I had nothing much to do. I sank into deep depression/health anxiety but not sure whether this was retirement or menopause based. To solve this and distract myself I started various part-time work projects [I am lucky in that I had contacts/options for this] and then became more busy than I had been before... This then led to more stress, which for the first time in my life I actually couldn't handle, and I took a step back and a long look at my life.
I have decided to continue working part-time, but not take on anything I feel will lead to stress. This took some time to accept as I used to be a driven and thrived on stress - but have had to accept I have changed, and therefore my goals must change.
My OH is also semi-retired so as far as days go, they vary but we have started to enjoy spending time together - walking the dog, shopping, just walking, watching TV, reading, and most importantly - holidaying.
This is a rambling, all about me post! But what I am saying is, think hard about whether you are good at having no routine and no 'calling' outside the home. I found not being 'valuable' very difficult but didn't realise this was my issue for a while. Now that I have, I am slowly learning to take things far slower. If you have hobbies/friends to spend time with, then it might be far easier. All my friends work, and my hobby is reading, so I am quite solitary - and it does get lonely without the day-to-day contact with the same people. Life goes on for those you leave behind at work, and it is easy to feel left
out.
So - advice -
1. think about what you are really like. Can you cope with no routine, lack of day-to-day contact with people?
2. how will you pass the time? without hobbies/people it is difficult to fill the time. Housework isn't fun and shouldn't last all day...!
3. Remember, depression/anxiety etc loves a vacuum, I am great when busy, bad when given time to think
4. can you afford to do all the things you want to do when you have the time?
Good luck, let me know what you decide. I do know some people who just love retirement! They tend to fall into two camps, those who have masses of hobbies and those who just like lying by a pool on holiday and quite like just relaxing.