Hello and welcome.
Any question you have type in a key word on the Caregiver Dementia main page, and it will bring up any discussion thread that may interest you.
I found keeping anecdotal notes helps to record my husband's 'off' behavior. I summarize them annually for our trip to Neuro Doc.
Since your husband is not cooperating you may just have to focus on you: educating yourself, checking into local respite care locations when you need You time, setting up your home to facilitate his new normal, etc.
Sometimes I would just have to get to the meltdown stage before my husband would listen to me (e.g., when it was time for him to stop driving; when I had to take his debit/credit cards away to protect us from his misuse).
We'll be here for you. Time to build your support team. 🫂