Multi editing in ue5

Hello everyone,

Me and a friend of mine have been wanting to make something for a while and wanted to work on a project together. We have tried multiple multi editor tuts from youtube but none of them seem to work. The biggest problem is that whatever i save as the client he is able to see but what ever he saves as the host i am unable to see, only when he uses something from the startercontent folder. Does anyone have a solution to this or a tutorial that actually helps explain everything?