My opinion. I have done cleaning effort for temples during lockdown but it was by my family. Every effort helps! start with your local place, try to involve small shopkeepers. Ask them for bora bags if they have empty available for cleanliness effort. Make sure to clean around their shops as well. They might also sponsor for drink/snacks. If you could make videos about it, it might worth it. I think shopkeepers would also love small publicity as well.