Marketing advice for a newly set up Company

Hi We started a company called Bacteria Busters in October 2020, we have flyers website and are currently doing a mailshot to schools but need advice as to how we would get into business commercial sites etc. Our website is www.bacteria-busters.co.uk. I have attached the newsletter we have uswd for schools, we are also thinking estate agents with a possible sale point of their buyers/sellers using the service.