We planned to move to Missouri after we retired, but we waited for a year before putting our houses on the market. During that year we donated, gave away, or threw out most of the clutter in our houses. This reminds me of what you are doing right now! We tried to get rid of everything we could buy again after the move, and kept very little, thinking we could donate the last of our furniture at the last minute and then share one small rental truck for everything else.
After this massive de-cluttering, we spent a couple of months having our houses fixed up to sell, having everything imaginable checked and repaired, and having the entire interior and exterior trim of our brick homes repainted. Painting is a lot more work than I had remembered so after one room I hired someone to paint the rest. In my case that also involved removing wallpaper from every room, and I replaced the flooring in all the bedrooms and common spaces in my house. So, by the time we put our homes on the market in late 2010 they were pretty nice.
All of this was a lot easier to do after I retired, than before, because I had more time for it. Good luck with your efforts.
After all of that, we each spent several months essentially living in a showroom with our homes on the market, open houses every weekend, and so on. We had no luck, apparently due to the market at that time, so we decided to wait at least five years and perhaps reconsider then.
All I can say is, thank goodness I had retirement in mind when I bought my present home back in 2002. It is 1600 square feet, which is a manageable size, and it already has many elderly-friendly upgrades so I am perfectly fine in it for the foreseeable future. It occurred to me this morning that I hadn't even gone into the spare bedroom in months, so I went in there just now to make sure the room was still there and intact.