Hi Lester,
Welcome to Microsoft Community.
I'm Hahn and I'm here to help you with your concern.
I'm sorry to hear that you've been having difficulty setting up a network between your Windows computers.
Here are some steps you can try to create a network between two Windows computers and enable file sharing:
File sharing over a network in Windows - Microsoft Support
Share things with nearby devices in Windows - Microsoft Support
Would you tell me if you have set up file sharing according to the steps provided earlier? If you encounter an error after setting up successfully, can you tell me what problem you encountered? I'll try my best to help you solve it.
Your Sincerely
Hahn - MSFT | Microsoft Community Support Specialist