Alzheimer’s Australia has some great learning programs for all aspects of living with, and designing for, dementia. The Virtual Dementia Experience provides a simulated experience that provides insights into what it is like to live with memory loss and cognitive changes. Although it was initially designed for aged care workers, it’s helpful for anyone with a connection to dementia or wanting to better understand the condition for design purposes. Alzheimer’s Australia run sessions across Australia and you can book online.
There are also some practical online modules you can do at your own pace. The first is free to see if it what you are looking for, and the subsequent modules are modestly priced at $25 each. They cover communicating, a person-centered practice, and a problem solving approach. Mostly aimed at allied health professionals, but could be useful for designers wanting to get a real feel for the topic.
More specifically for environments you can download Enabling Environments, and a great app for tablets and smartphones for the Dementia Friendly Home. The Resources tab on the website provides more on these topics.