If you want something like Homegroup then here is something you can try.
To get you PC's to visible under File Explorer network section then most important part is to start some required services.
Push Win Key and type "Services", locate those services, start them and set Start type to Automatic (Delayed Start).
Services are:
- Function Discovery Provider Host
- Function Discovery Resource Publication
- SSDP Discovery
- UPnP Device Host
Look more details about sharing from example how I have setup my network to work with Win 10 1803.