Dolly17 I was 62 when I moved from the family house to a 3-bedroom terrace just for me. Good age, I was still working, and was able to do virtually all the changes I wanted for that house over the next few years from my salary. I was convinced, when I moved that this was going to be my 'forever' home. It was not, and 16 years later, I moved into my current flat.
However, that house move was still in the same are, just a mile away from family house, so I knew the area very well indeed.
If you are moving to entirely different area, have you researched it well.? Public transport, Doctors, hospitals, shops, libraries, theatres cinema, u3a, etc. etc.
Having looked at just one property, does not really give you any overview of what you might wish to move into Have you made a list of what is essential in any new property for you, with a second list as to what would be nice (is desirable), and a third list saying, good, but not essential.
Hae you checked out similar types of flats on Rightmove to see what you might be able to get. Assuming you are expecting to use your present house for the money to purchase how do you know how much you are likely to get on your sale - and do take on board the fact that moving/selling/buying is expensive and a large amount of what you get for the sale will be spent on things like Solicito5rs fees, Estate Agents fees, stamp duty (maybe), removal expenses, new furniture, curtains, carpet after the move, etc. etc.
It is not something to be rushed into, take your time, and plan well. And, until you have an offer on your current house, no good EA will accept an offer from you