Don't hesitate, it's terribly important to downsize while you still can. Its an exhausting business, but you can enjoy doing up a new house, and making sure it will be easy and practical for when you get really old and creaky. (I put in a low bath , which is very easy to get in and out of.) It took me three years to sell the house in Devon, and getting rid of so much was heart-breaking, especially my books, but in the end I found the clutter-free look a relief. We moved from a small village to the edge of a town with lots of amenities, and it has been a huge success. We have a variety of neighbourhood shops, DH can walk into the centre, and I hop onto a (free) bus for shopping, and the cinema, a great joy. It's sad not to be able to host family parties any more, but I don't think I could anyway, and one can always contribute with food or drink. One DD lives 30 minutes away, and the other can stay with her if needed, so we can still all get together for Christmas and birthdays. Devon was beautiful, but too far away. Now we are in the Midlands we get far more people dropping in, which is lovely. So, teddymac take a deep breath, and go for it! Give yourself lots of time to enjoy a simpler life.
