A developer or a SaaS provider will deal with all the problems, you just need to find it on the Internet using a Google search engine. There are many such sites and it is not a problem to find sites that are engaged in SaaS.
If you are not a programmer, then you will not do anything with the servers yourself, contact some IT specialist who will do everything for you and show you how to run systems on the server, how many you can run and how it will work