For some reason, although I have done it before, right now even signed in I am unable to update my profile here.

Same on my phone:
Touch Avatar
Touch settings
Third row from the top-- the second line after the banner-- is where you find "about me" and "caring for"

I am on a tablet. I clicked my Avatar then
Profile then
Settings then
You will see tabs for "care for" and "about me"

I'm on a PC and this is what I see:

Look for the line below the AgingCare banner that says
Profile News Feed Activity Settings

Right below that in a smaller, grey font I see

My Topics Caring For About Me Subscriptions My Account Privacy

GD, when I tap my avatar and go to "settings" (on my Galaxy Tablet, don't know if you are working from a phone, that might be different), I see the Aging care banner line on top, then a second line of options and then a third line, where " caring for" and "about me" reside.

Hope this helps.

You need to do it through your settings not the profile link, specifically the caring for and about me links.