First of all, it sounds like you have a great idea with a positive impact.

To your question:

Make sure to include a chat option in whatever page you have clicked-through from your PPC. In addition, what information are you able to capture on your landing page (that I presume clicks through)? I'd highly recommend including a phone number. Whatever info you do capture, make sure to follow up as soon as possible (within 10 minutes ideally). I'm happy to share more next steps from here.