Welcome from me too, it's not easy and none of us face the same circumstances.
I did it for my wife and my mum, wife got diagnosed first, ended up me and my mum caring for my wife, not the best of times.
I'm over it now and just help out with a neighbours mum who's starting to struggle a bit these days, I don't mind but 3 times round and I honestly don't know I want to do it all again, they have 2 very young children and are struggling to cope with nana's illness so I step in, hell I'm on first name terms with half of the staff at the memory clinic.
What comes around goes around and when I was ill they were there for me, so just doing my bit as they say. K