You are welcome to shareYourself.
Absolutely, this is the right place to find volunteers as this is a community of do-gooders passionate about social impacts across the world.
I'll advise you to create a project here on ShareYourself and make a call for volunteers by your posts. Alternatively, you can also go to the "Opportunities" section and create a call for volunteers.
Lastly, you didn't specify if this is going to be location-based or not. I wish you and your husband a very successful project. Let's ensure we keep the world temperature below 1.5 degrees.