Hey painter. Wow! You are inspiring. Thank you for sharing.
If you're looking to get the word out at a local level you may want to try senior centers. Or government bodies usually have agencies that deal with elder issues. Maybe you can contact them and give them info to at least have on hand for people looking for help.
If you're looking to get something out beyond locally maybe a publication like something AARP puts out?
What you're looking to do is admirable. Good luck and I would be interested on any progress you have.