It is 1st September and too early to be looking for winter clothes. The autimn/winter ranges have yet to reach the shops and may not do for some weeks, so it is too early to look for winter clothes. The choice will be too limited.
Meanwhile, look around you. Look at what ither women are wearing that you like. Do old fashioned things like look at the fashion pages in newspapers and magazines and get your eye in for what you like and would feel comfortable in.
Forget about fashion, it is ephemeral and changes with the wind. I was brought up to develop a style of dressing, not to follow fashion. Style means wearing clothes you feel confident in - and in my case comfortable as well.
As for age, forget it. Anyone, any age can wear anything. There exists photo in our family taken a few years ago when I was 75, DDiL was 49 and DGD. The three of us all dressed in leggings with sweaters of various types and clumpy footwear. As i sad age is irrelevant.