Right - there’s a reason why it was ‘enormously reduced’ in the sales.
I Am In My 60s. It has never occurred to me to apply the words ‘old lady’ to myself. I only ever wear beautiful clothes and I’m adept at massive discounts on very expensive clothes. I would never have bought that.
Firstly knitted cotton almost never looks good. It doesn’t reflect light. And the colour is … off. (Yes you can change the buttons, but …)
The proportions are terribly awkward. When you see that sort of old school look cardigan modelled on fashionable sites it’s always with a leather or suede mini skirt, or very short denim shorts. Not with anything long , or heavy, or below mid-thigh. Is that how you’re going to wear it? (If not, it’s just a long cardigan which people will unconsciously read as style free and bought to cover the area between waist and thighs.)
The shape essentially only works with a lot of skin showing - and from the photo I wouldn’t say it’s a colour that particularly flatters you. (The blue throw over your mirror looks lovely against you, btw.) So, if you spend a lot of time on boats, in white shorts and a vest - fine. Otherwise I don’t think it’s the great buy you hoped for.
I do genuinely think your aims were excellent! But I’d suggest looking for wool, in every possible weight, rather than knitted cotton. It’s always going to look better.