Sorry to hear your news. My wife was diagnosed with Vascular Dementia last October. Up till then she had slight memory problems but could even drive. Now she needs help to get washed, dressed, eat and with toilet etc. But the rate of decline is very variable I understand. I suggest use the links given. Phone the helpline and Google vascular dementia. I had never heard of it till last October and wish I did not know about it now. But there is much help, encouragement and advice on here, so I respectfully suggest ask all the questions you have.
Sorry to put so much bad news, but best to be prepared. My suggestion is help your husband to continue with whatever he enjoys. The more he can do for himself the better for both of you.
Best wishes, Clunchman.