Oh dear! It was only an opinion on a pair of trousers - not your entire character and lifestyle! 
But (speaking as someone of the same generation as you) I don’t think women in their 60s here have any qualms about wearing denim, or even a stylish bomber jacket if it suits them. It may be different where you are?
I find browsing a few websites such as
https://www.matchesfashion.com/womens/designers/raey?is=Raey
https://www.alexandragolovanoff.com/en
help to assure me (if assurance were ever needed!) that I can still dress exactly as I want.
These Acne Studio trousers have a similar colour scheme to those you linked - so there may be some styling ideas here.