I think the first thing would be to organize meetings, like this one, to fully explain to seniors the changes to the voting system. You also need to ensure you are there for them, more than every four years, and hold meetings in every region so that they fully understand the changes.
FADOQ feels obligated to clearly explain to its members the nature of the changes that will be made so that they are not afraid of the new voting system. We know that the older we get, the harder it is to adapt to change. We will need to explain to them the reasons for the changes and the resulting benefits. Seniors aren't necessarily resistant to change, even though they sometimes seem to be because they no longer know what to do. We will need to support them as they navigate this. We will also have to be flexible with them when they come to vote so that they fully understand how to vote. Polling stations might have people designated to explain to seniors how to fill out the new ballot.
Time definitely needs to be taken to provide seniors with good explanations. People who have been voting for 50 or 60 years might feel that their routine has been disrupted.