Do you know anyone that you trust unconditionally?

You should assign someone durable power of attorney so that they can make decisions and manage your finances. Start planning medical and care decisions right now.

Otherwise, why do you think you would buy a gun? That’s not really common among people with dementia. Does your state have medical marijuana? Get a medical marijuana card. Most places, that will disqualify you or make it difficult.

Make sure someone is getting you evaluated regularly. Mental illness is also a disqualifier for gun purchases. A dementia diagnosis won’t necessarily disqualify you, though (except in Hawaii and Texas).