you may do it but ONLY for tests. if you want to host that wordpress website than... buy a host service!

rdp are one server sharing resources by hungry uploaders, "unraring" megafiles, it goes slower and slower (that why people complain that their rdp is slower )

yes, shared host also share the same server but... users are not using other kind of resources, you have a dedicated ip, you have your cpanel, setup email etc etc.