You can definitely learn any language, any skill,...at any age.
My mother who is in her 60s' too, she is preparing for a master degree in psychology and she studies in French while she grew up speaking and teaching Arabic.
Go for it and learn whatever you want.
As long as we didn't lose our mind, we learn new things every single day... And why not learn a new language 😉
I wish you all the best 👍🏻